Note4Students
From UPSC perspective, the following things are important :
Prelims level: Zero Shadow Day
Mains level: Not Much
Central idea: Many cities across India are experiencing Zero Shadow Day since the sun was directly overhead at that time.
What is Zero Shadow Day?
- Zero Shadow Day is a phenomenon that occurs twice a year at every point on Earth located between the Tropic of Cancer and the Tropic of Capricorn.
- During Zero Shadow Day, vertical objects appear to cast no shadow at local noon, when the sun is at its zenith directly above the object.
- It occurs when the sun’s location moves from 23.5°N to 23.5°S of Earth’s equator and back, causing the shadow to disappear beneath objects at local noon.
Why does it happen?
- It occurs due to the movement of the sun from south to north during the Uttarayan and back from north to south during Dakshinayan.
- This movement is caused by Earth’s rotation axis being tilted at an angle of roughly 23.5° to the axis of revolution around the sun.
- All places whose latitude equals the angle between the sun’s location and the equator on that day experience Zero Shadow Day, with the shadow disappearing at local noon.
Try this PYQ:
On 21st June, the Sun-
(a) Does not set below the horizon at the Arctic Circle
(b) Does not set below the horizon at Antarctic Circle
(c) Shines vertically overhead at noon on the Equator
(d) Shines vertically overhead at the Tropic of Capricorn
Post your answers here.
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Note4Students
From UPSC perspective, the following things are important :
Prelims level: Temperature Anomaly
Mains level: Not Much
Central idea: Global warming does not mean that each month or each year will be warmer than the previous month or the previous year.
What is Temperature Anomaly?
- This is a measure of how much the actual temperature deviates from the long-term average temperature for a particular location and time period.
- Anomalies are calculated by taking the difference between the actual temperature and the long-term average temperature, and then averaging this difference over a specified period.
- The anomalies are due to land-ocean-atmosphere processes that dynamically determine the weather and climate.
- It is a useful tool for understanding changes in climate over time, as they allow scientists to compare temperatures from different time periods and locations.
- For example, a temperature anomaly of +2°C in a particular region in a given year means that the temperature in that region was 2°C higher than the long-term average for that region and time period.
Why study this?
- Long-term trend: By analyzing temperature anomalies over time, scientists can identify long-term trends in climate change and predict future changes.
- Track extreme weather event: These are also used to monitor extreme weather events such as heatwaves, droughts, and floods, which can have significant impacts on human health, agriculture, and natural ecosystems.
Recent context: Second warmest March on record
- The fact that March 2023 was the second warmest March on record suggests that the planet is experiencing long-term warming.
- It is a clear indication of the impact of human activities on the planet.
- The burning of fossil fuels and deforestation have led to an increase in greenhouse gases, which trap heat in the Earth’s atmosphere and contribute to global warming.
- This warming trend is expected to continue and worsen in the coming years, leading to more extreme weather events, sea level rise, and other negative impacts on the planet.
What does this mean for local weather?
- The second warmest March on record can have significant impacts on local weather patterns.
- As mentioned earlier, the warming over the northwest to the west of India caused cooler than normal weather over Mumbai and excess pre-monsoon rains over the northwest.
- On the other hand, Kerala and Odisha experienced scorching heatwaves.
- These weather anomalies can have serious implications for agriculture, water resources, and public health.
Implications
- Crop yields decline: This can be affected by extreme weather events, and changes in precipitation patterns can lead to water shortages or flooding.
- Heatwaves: This can cause heat stress and other health problems, particularly for vulnerable populations such as the elderly and young children.
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Note4Students
From UPSC perspective, the following things are important :
Prelims level: Bangalore Principles of Judicial Conduct
Mains level: Read the attached story
The Supreme Court of India has directed the Registrar General of the Calcutta High Court to investigate an alleged interview given by a judge to a news channel in which he made remarks against a politician. This is cited against Bangalore Principles of Judicial Conduct.
What are Bangalore Principles?
- The Bangalore Code of Judicial Conduct was drafted in 2001 for the Judicial Group on Strengthening Judicial Integrity and presented to the Round Table Meeting of Chief Justices in November 2002.
- Resolution 23 of the United Nations Social and Economic Council promotes implementation of the Bangalore Principles by the judiciaries of Member States.
- The principles are intended to establish standards for ethical conduct of judges.
- They are designed to provide guidance to judges and to offer the judiciary a framework for regulating judicial conduct.
Six core values recognized
| S. No. |
Principle |
Description |
| 1. |
Independence |
Judges must be free to make impartial decisions based on the law and facts, without any influence or pressure from external sources. |
| 2. |
Impartiality |
Judges must be unbiased and treat all parties equally, without any favoritism or discrimination. |
| 3. |
Integrity |
Judges must have high moral and ethical principles, be honest, and act with transparency and fairness. |
| 4. |
Propriety |
Judges must avoid any impropriety or appearance of impropriety, such as conflicts of interest or inappropriate behavior. |
| 5. |
Equality |
Judges must uphold the principle of equality before the law, treating all people with respect and dignity. |
| 6. |
Competence and diligence |
Judges must have the necessary knowledge, skills, and qualities to perform their duties effectively, and must work diligently and efficiently. |
Significance of these principles
- The principles define their meaning and elaborate in detail on what kind of conduct is to be expected in concrete terms of the persons concerned in order to put the respective value into practice.
- A number of specific instructions are given under each of the values.
- Not only have some States adopted the Bangalore Principles but others have modelled their own Principles of Judicial Conduct on them.
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Note4Students
From UPSC perspective, the following things are important :
Prelims level: Thirunelly Temple
Mains level: NA
The Indian National Trust for Art and Cultural Heritage (INTACH) has urged the government to conserve the historically significant structures, including the 600-year-old ‘Vilakkumadom’, an exquisite granite structure, at the Sree Mahavishnu Temple at Thirunelly in Wayanad district.
About Thirunelly Temple
- The temple is dedicated to Lord Vishnu and is also known as Sahyamala Kshetram.
- It is also referred to as the ‘Kashi of the South’ and is considered as an important pilgrimage center for Hindus.
- It is located at the confluence of three rivers – Papanasini, the holy river, which is believed to have the power to wash away sins, Kudamurutti, and Koothappuzha.
- The temple has a unique circular structure made of granite stones, which is believed to have been constructed by Lord Brahma himself.
- It has beautiful architecture and features intricate carvings, mural paintings, and sculptures.
- The temple celebrates several festivals throughout the year, including Vishu, Navaratri, and Thirunelli festival.
Renovation plan
- The renovation works include the reconstruction of the chuttambalam or the structure around the sanctum sanctorum, except for the balikkalpura structure on the front side.
- The renovation work also includes the completion of the vilakkumadam, an exquisite granite structure that has a history dating back to the 15th century AD.
- The renovation works also include the renovation of the panchatheertham pond and the pathway to the papanasini bath ghat where devotees perform the bali ritual.
Why in news?
- The temple structure has a history dating back to the 15th century AD, and stories related to the architecture and style of the temple are associated with it.
- In guise of renovation, there is a concern over the loss of valuable precincts and the destruction of heritage.
- The incomplete structure that stood as testimony to a rich cultural heritage has been remodelled in an insensitive way.
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Note4Students
From UPSC perspective, the following things are important :
Prelims level: Op Kaveri
Mains level: Not Much
India has launched “Operation Kaveri” to evacuate its citizens from war-torn Sudan.
What is Operation Kaveri?
- It is the recent series of evacuations held by India over the last few years to rescue its nationals in crisis-hit countries. India rescued its nationals last year from war-hit Ukraine and Afghanistan.
- The operation was launched in response to the conflict and breakdown of essential services in Sudan that had brought the country to a standstill.
- India has positioned two transport aircraft of the IAF in the Saudi Arabian city of Jeddah and a naval ship at a key port in Sudan as part of its contingency plans to evacuate its stranded nationals.
Behind the name ‘Kaveri’
- The choice of naming this operation as ‘Operation Kaveri’ has a lot of significance.
- Kaveri is one of the major Indian rivers flowing through the southern states of Karnataka and Tamil Nadu.
- The river is sacred to the people of the region and is worshipped as the Goddess Kaveriamma (mother Kaveri).
- Rivers reach their destination irrespective of barriers. It’s like a mother who will ensure she will bring her children back to safety.
About Sudan
- Sudan is a country located in North Africa, bordered by Egypt to the north, Libya to the northwest, Chad to the west, the Central African Republic to the southwest, South Sudan to the south, Ethiopia to the southeast, and Eritrea to the east.
- It is the third-largest country in Africa and has a diverse population of around 43 million people.
- According to the World Bank, around 46% of the population lives below the poverty line, and many Sudanese people struggle to access basic services such as healthcare, education, and clean water.
What is the crisis all about?
- Sudan is facing a crisis due to fighting between two rival military factions.
- The conflict involves the Sudanese army and the paramilitary Rapid Support Forces (RSF).
- The fighting began in April 2022 after tensions rose following the coup that saw the two factions topple a civilian government in October 2021.
- The conflict began when an internationally-backed plan to launch a new transition with civilian parties was floated.
- Under the plan, both the army and the RSF had to cede power, but two issues were contentious: the formal placing of the army under civilian oversight and the timetable for the RSF to be integrated into the regular armed forces.
Global Implications of the Conflict
- The volatile region, which borders the Red Sea, the Sahel, and the Horn of Africa, could be destabilized if the fighting continues.
- The conflict in Sudan has the potential to cause a refugee crisis, with people fleeing the country to escape the violence and instability.
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Note4Students
From UPSC perspective, the following things are important :
Prelims level: Vibrant Village Programme
Mains level: Not Much
The Centre’s Vibrant Villages Programme (VVP) which aims to develop infrastructure and open up villages to tourists along the China border will be integrated with the Gati Shakti Mega Project.
What is Vibrant Villages Programme (VVP)?
- Under the VVP, the selected villages will be provided with basic facilities like all-weather roads, potable piped water, 24×7 electricity, good mobile and internet connectivity, healthcare, and enhanced livelihood options.
- The VVP aims to prevent migration of border population, catalyze reverse migration, and keep all villages along the LAC well-populated from the strategic and security point of view.
Villages selected
- Kibithoo, one of the remotest circle headquarters of Arunachal Pradesh, is the first village to be developed under the VVP.
- The villages will also serve as the Indian Army’s eyes and ears in these remote areas.
- 2,967 villages in 19 border districts of Arunachal Pradesh, Sikkim, Uttarakhand, Himachal Pradesh and Ladakh will be developed under the VVP, with 662 villages being developed in the first phase of the project.
Components
- The VVP programme involves a number of livelihood programmes, including bee-keeping, improving agricultural yields, encouraging handicrafts and local products, and providing market linkages to them.
- The programme also focuses on promoting high-end tourism and training local people to cater to tourists.
- Provision of 24×7 power through micro-hydel power plants, solar power panels, and windmills is also a vital component of the programme.
Impact
- The development of border villages under the VVP will help provide a better livelihood for the locals, improve the quality of life and prevent migration from these remote areas.
- It will also help in gathering intelligence from the people of border villages and provide the Indian Army with better access to these areas.
Comparison with China’s Model
- India’s Vibrant Village Programme (VVP) is people-centric and aims to enhance the quality of life of the locals.
- China’s Xiaokang villages lack proper planning for providing livelihood opportunities, healthcare and education facilities, and proper transportation.
- Beijing’s aim of keeping civilian residents of these villages as watchful eyes over activities across the LAC and on Indian Army patrols has been negated.
- Most of the villages now serve as residential quarters and logistical facilities for the PLA.
- India’s VVP scores over China’s building of new Xiaokang villages as it has a holistic approach to development.
Why merged with Gati Shakti?
- Gati Shakti brings 16 ministries, including Railways and Roadways, together for integrated planning and coordinated implementation of infrastructure connectivity projects.
- It allows government departments to break operational silos.
- By integrating VVP with Gati Shakti, there can be better coordination between various ministries and departments to ensure the smooth implementation of the programme and to avoid any duplication of efforts.
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Note4Students
From UPSC perspective, the following things are important :
Prelims level: Pushkaran/Pushkarlu Festival
Mains level: Not Much
Central Idea: The 12-day Pushkaralu festival of Telugu-speaking people began on April 22 in Varanasi.
Pushkaralu Festival
- Pushkaram is an Indian festival dedicated to worshiping of 12 sacred rivers.
- The celebration happens annually, once in 12 years along each river.
- Each river is associated with a zodiac sign, and the river for each year’s festival is based on which sign Bruhaspathi (Jupiter) was in at the time.
- It is believed that bathing in the sacred river during Pushkaram cleanses the devotees of their sins.
- This year festival involves worshipping ancestors and the river Ganga and is being organised in Kashi after a gap of 12 years.
Why is it celebrated once in 12 years?
- In India, we have 12 major rivers such as Ganga, Yamuna, Narmada, Saraswathi, Godavari, Krishna, Kaveri, Bhima, Tapati, Tungabhadra, Sindhu, Pranhita for which the Pushkaram festival is celebrated for each river according to the zodiac sign of that river.
- The 12 days after the Jupiter enters that particular zodiac sign will be the Pushkaram/Pushkaralu which is a 12-day festival for that river.
- Hence Pushkaralu comes for every 12 years.
Legend of the Festival
- According to legend, after severe penance, the devotee Pushkara was blessed by Lord Shiva with the ability to live in water and purify holy rivers
- On a request from Bruhaspati (Jupiter), Pushkara decided to enter one of the 12 sacred rivers, including Ganga, Yamuna, Godavari, and Krishna, among others
- The river for each year’s festival is decided in accordance with Brihaspati travel from one zodiac sign to another
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Note4Students
From UPSC perspective, the following things are important :
Prelims level: Microbes
Mains level: NA
Central idea
- Researchers conducted a genetic analysis of microbial communities on the South Col of Sagarmatha (Mount Everest).
- The article examines the human microbiota on the inhospitable slopes of Mount Everest esp. the South Col ridge.
Microbial Communities on the South Col
- Microbial communities were collected from sediment samples left by human climbers on the South Col, 7,900 meters above sea level (msl).
- The South Col is inhospitable due to low oxygen, strong winds, high levels of UV radiation, and temperatures below minus 15 degrees Celsius.
- Visible signs of life are absent above 6,700 msl except for a few species of moss and a jumping spider.
- Microbes are carried to high altitudes by birds, animals, winds, and dust particles.
Microbes found
- Using sophisticated methods such as 16S and 18S rRNA sequencing, the microbe hunters were able to identify the bacteria and other microorganisms found on the South Col.
- 16s rRNA is a component of the 30S subunit in prokaryotic ribosomes while 18s rRNA is a component of the 40S subunit in eukaryotic ribosomes.
- 16S ribosomal RNA (rRNA) sequencing is an amplicon sequencing technique used to identify and compare species of bacteria present within a given sample.
- 16S rRNA gene sequencing is used to study phylogeny and taxonomy of samples from complex microbiomes or environments that are difficult or impossible to study.
- Microbes like Modestobacter altitudinis and the fungus, naganishia, which are known to be UV-resistant survivors are found there.
History of Mount Everest and Naming
- Nepal’s eminent historian, late Baburam Acharya, gave the Nepali name Sagarmatha to Mount Everest in the 1960s.
- Andrew Waugh, British Surveyor General of India, discovered Mount Everest in 1847 and named it after his predecessor, Sir George Everest.
- Radhanath Sikdar, an Indian mathematician and surveyor, was the first person to show that Mount Everest was the world’s highest peak in 1852, with the help of a special device.
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Note4Students
From UPSC perspective, the following things are important :
Prelims level: Groundwater in India
Mains level: Read the attached story
Central Idea: The Jal Shakti Ministry is working on an ambitious plan to deploy a vast network of groundwater sensors to continuously relay information on groundwater levels and contamination.
What is Groundwater?
- Groundwater is the water found underground in the cracks and spaces in soil, sand and rock.
- It is stored in and moves slowly through geologic formations of soil, sand and rocks called aquifers.
- Aquifers are typically made up of gravel, sand, sandstone, or fractured rock, like limestone.
- Water can move through these materials because they have large connected spaces that make them permeable.
- Aquifers, hand-dug wells, and artesian wells are different types of sources of groundwater.
Sensors-based Groundwater Monitoring
- Under this new initiative, around 16,000-17,000 digital water level recorders will be connected to piezometers in the wells to transmit information digitally.
- In the next three years, the CGWB aims to increase its network from the existing 26,000 to about 40,000.
- When combined with similar networks possessed by other institutions, India will have about 67,000 digitally recordable units to monitor groundwater dynamics.
Significance of the move
- This would make groundwater visible much the same way as air quality and meteorological variables
- The information will be publicly accessible.
- It will potentially provide groundwater forecasts to farmers that would be useful for sowing and updated advisories that can influence groundwater extraction policies by states
Why monitor groundwater?
- Nitrate contamination – a result of the use of nitrogenous fertilizers – has been observed in some regions
- Groundwater contamination, mostly “geogenic” (natural), hasn’t significantly changed over the years.
- But nitrate contamination and fluoride and arsenic contamination have been observed in some regions and states.
Present system of monitoring
- The Central Groundwater Board currently relies on a network of about 26 thousand groundwater observation wells.
- It requires technicians to manually measure the state of groundwater in a region.
Groundwater Extraction in India
- The total annual groundwater recharge in the country has been assessed as 437.60 billion cubic meters (BCM)
- The annual extractable groundwater resource has been assessed as 398.08 bcm, with actual extraction of 239.16 bcm
- The average stage of groundwater extraction for the country as a whole works out to be about 60.08%, and anything above 70% is considered “critical”
Also read
Groundwater Extraction Lowest in 18 years
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Note4Students
From UPSC perspective, the following things are important :
Prelims level: CBAM
Mains level: Not Much
The Indian government will be analyzing how the European Union’s (EU’s) proposed carbon border adjustment mechanism (CBAM) will affect the Indian industry. The CBAM is set to start from October this year.
Carbon Border Adjustment Mechanism (CBAM)
| Proposed by |
European Union (EU) |
| Purpose |
To reduce carbon emissions from imported goods and prevent competitive disadvantage against countries with weaker environmental regulations |
| Objectives |
Reduce carbon emissions from imported goods
Promote a level playing field between the EU and its trading partners
Protect EU companies that have invested in green technologies |
How does CBAM work?
| Coverage |
Applies to imported goods that are carbon-intensive |
| Integration |
Covered by the EU’s Emissions Trading System (ETS), which currently covers industries like power generation, steel, and cement |
| Implementation |
CBAM taxes would be imposed on the carbon content of imported goods at the border, and the tax rates would be based on the carbon price in the EU ETS |
| Exemptions |
Possible exemptions for countries that have implemented comparable carbon pricing systems |
| Revenue Use |
Revenue generated from CBAM taxes could be used to fund the EU’s climate objectives, such as financing climate-friendly investments and supporting developing countries’ climate efforts |
Who will be affected by CBAM?
|
Details |
| Countries |
Non-EU countries, including India, that export carbon-intensive goods to the EU |
| Items |
Initially covers iron and steel, cement, aluminium, fertilisers, and electric energy production |
| Expansion |
The scope of the CBAM may expand to other sectors in the future |
Advantages of CBAM
- Encourages non-EU countries to adopt more stringent environmental regulations, reducing global carbon emissions.
- Prevents carbon leakage by discouraging companies from relocating to countries with weaker environmental regulations.
- Generates revenue that could be used to support EU climate policies.
Challenges with CBAM
- Difficulty in accurately measuring the carbon emissions of imported goods, especially for countries without comprehensive carbon accounting systems.
- Potential for trade tensions with the EU’s trading partners, especially if other countries implement retaliatory measures.
Conclusion
- The CBAM is a proposed policy by the EU to reduce carbon emissions from imported goods and to promote a level playing field between the EU and its trading partners.
- Although the CBAM has its challenges, it has the potential to incentivize non-EU countries to adopt more stringent environmental regulations and reduce global carbon emissions.
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Note4Students
From UPSC perspective, the following things are important :
Prelims level: Waterbodies definition, Key stats
Mains level: Water conservation efforts
The Ministry of Jal Shakti has recently released the report of the first census of waterbodies in India.
Waterbodies Census
- It is the first ever process of conducting a comprehensive survey of all the waterbodies in a particular region or country.
- The census aims to identify and classify different types of waterbodies like ponds, tanks, lakes, and reservoirs, among others.
- The information can help in the development of strategies for their conservation and management.
Major highlight: Definition of Waterbodies
- The census defines a waterbody as a unit bounded on all sides that is used for storing water for various purposes.
- These units can be either natural or man-made and may or may not have masonry work.
- Waterbodies are used for a variety of purposes, such as irrigation, industrial use, pisciculture, domestic and drinking water supply, recreation, religious purposes, and groundwater recharge.
- The report states that any structure that accumulates water from ice-melt, streams, springs, rain or drainage of water from residential or other areas or stores water by diversion from a stream, nala or river is also considered a waterbody.
Key facts: Distribution of Waterbodies
According to the report, India has 24.24 lakh water bodies like ponds, tanks, and lakes, with West Bengal having the highest number (7.47 lakh) and Sikkim having the least number (134).
| Waterbody Type |
Percentage of Total Waterbodies |
Number of Waterbodies |
| Ponds |
59.5% |
14,42,993 |
| Tanks |
15.7% |
3,81,805 |
| Reservoirs |
12.1% |
2,92,280 |
| Water Conservation Schemes/Percolation Tanks/Check Dams |
9.3% |
2,26,217 |
| Lakes |
0.9% |
22,361 |
| Others |
2.5% |
58,884 |
State-Wise Distribution of Waterbodies
- The report highlights that West Bengal has the highest number of ponds and reservoirs, while Andhra Pradesh has the highest number of tanks.
- Tamil Nadu has the highest number of lakes, and Maharashtra is the leading state with water conservation schemes.
- South 24 Parganas district in West Bengal has been ranked as the top district having the highest (3.55 lakh) number of waterbodies across the country.
Issues highlighted: Encroachment of Waterbodies
- Total 1.6% of waterbodies reported to be encroached
- 4% of encroached waterbodies in rural areas, 4.6% in urban areas
- 8% of encroached waterbodies have less than 25% area under encroachment
- 8% of waterbodies have more than 75% area under encroachment
Conclusion
- The census provides a comprehensive overview of the distribution of waterbodies in India, highlighting the states and districts with the highest number of waterbodies.
- The data on encroachment of waterbodies can help in identifying areas where conservation efforts are needed to protect these valuable resources.
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Note4Students
From UPSC perspective, the following things are important :
Prelims level: NA
Mains level: Interstate border disputes
Central idea
- Ahave had a long-standing border dispute over 123 villages that are located in 12 districts of Arunachal and 8 districts of Assam.
- On April 21, 2022, an MoU was signed between the two states to resolve the dispute.
Genesis of the dispute
- The border dispute between Arunachal Pradesh and Assam has around 1,200 points of conflict along their 804 km boundary, which began in the 1970s and intensified in the 1990s.
- The issue goes back to 1873 when the British government introduced the inner-line permit, vaguely separating the plains from the frontier hills.
- In 1954, the North-East Frontier Agency (NEFA) was formed, and 3,648 sq. km of the “plain” area of Balipara and Sadiya foothills was transferred to the Darrang and Lakhimpur districts of Assam based on the 1951 report.
- Arunachal has been celebrating its statehood with an eye on China since 1987, and its people living in the transferred patches have been resentful, claiming that the transfer was done arbitrarily.
- However, their counterparts in Assam say the 1951 demarcation is constitutional and legal.
Past efforts to resolve the border issue
- Several efforts were made in the past to resolve the border dispute between Assam and Arunachal Pradesh.
- In 1979, a high-powered tripartite committee was constituted to delineate the boundary, and around 489 km of the 800 km were demarcated by 1983-84.
- Further demarcation could not take place because Arunachal Pradesh did not accept the recommendations.
- The apex court appointed a local boundary commission in 2006 to resolve the dispute. However, nothing came of it.
Process leading up to the signing of the MoU
- Assam CM and Arunachal CM commenced CM-level talks over the border issue on January 24, 2022.
- In their second meeting on April 20, 2022, they made key decisions.
- The border issues between both the states would be confined to a list of 123 villages which Arunachal Pradesh had claimed before the Local Commission in 2007.
- A boundary line delineated by the high-powered tripartite committee in 1980 would be taken as the notified boundary, and all realignment would be done in relation to it.
- Both states would set up 12 regional committees covering the 12 districts of Arunachal Pradesh and the 8 counterpart districts of Assam for joint verification of the 123 villages.
Extent to which the issue has been resolved
- The MoU has resolved the dispute over 34 villages.
- The village boundaries of 49 of the remaining villages are unresolved.
- The MoU states that in these, the Regional Committees will finalize the boundaries within a period of six months “through continuous dialogue.”
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Note4Students
From UPSC perspective, the following things are important :
Prelims level: Hooghly River
Mains level: Not Much
Central idea: The East-West Metro corridor, the second line of Kolkata’s Metro network that is currently under construction, will connect Kolkata and Howrah, and one of its highlights is India’s first underwater transport tunnel spanning the Hooghly river.
Hooghly River: Some facts
|
Description |
| Name |
Bhagirathi Hooghly River (Anglicized alternatively spelled Hoogli or Hugli) |
| Source |
Close to Giria, north of Baharampur and Palashi, in Murshidabad |
| Length |
260 km |
| Flows through |
West Bengal |
| Endpoint |
Bay of Bengal |
| Importance |
Lifeline for Kolkata, transportation route for goods and people, historical trade route, cultural and ecological resource |
| Challenges |
Changing course, frequent floods, pollution from industrial effluents and sewage |
| Additional Information |
A man-made canal called the Farakka Feeder Canal connects the Ganges to the Bhagirathi to bring the abundant waters of the Himalayan river to the narrow river that rises in West Bengal.
The main course of the Ganges then flows into Bangladesh as the Padma.
The Bhagirathi Hooghly River is also called the Ganga or the Kati-Ganga in the Puranas. |
About the East-West Corridor
- The East-West Corridor is expected to significantly ease congestion in the city.
- The line connects Kolkata’s IT hub of Salt Lake Sector V to the western suburb of Howrah.
- The eastern part of the East-West line is operational while the western portion of the corridor is underground.
- There are 12 stations on the entire route, including the country’s deepest, Howrah, at a depth of 33 meters.
Key feature: Underwater Tunnel
- The tunnels under the Hooghly River are 520 meters long and more than 30 meters below the river surface at its deepest point.
- The trains will have an operational speed of 80 km/h and will cover the half-kilometre stretch under the Hooghly in about 45 seconds.
- The underwater tunnels have an internal diameter of 5.55 meters and an external diameter of 6.1 meters.
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Note4Students
From UPSC perspective, the following things are important :
Prelims level: Olive RIdley Turtles
Mains level: NA
Millions of baby Olive Ridley Turtles crawled towards the Bay of Bengal after emerging from eggshells along Odisha’s Rushikulyabeach in the Ganjam district.
Olive Ridley Turtles
|
Description |
| Scientific name |
Lepidochelys olivacea |
| Habitat |
Warm and tropical waters |
| Found in |
Pacific and Indian Oceans |
| Nesting sites |
Rushikulya rookery in Odisha |
| Largest mass nesting site |
Coast of Odisha in India |
| Conservation status |
Vulnerable in IUCN Red List |
| Listed in |
Schedule 1 in Wildlife Protection Act, 1972 |
Special feature: Mass nesting
| Notable behavior |
Arribadas |
| Nesting habits |
Synchronized mass nesting and return to the same beach where they hatched |
| Nest structure |
Conical nests about one and a half feet deep, dug with hind flippers |
| Incubation period |
45 to 60 days, influenced by temperature of the sand and atmosphere |
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Note4Students
From UPSC perspective, the following things are important :
Prelims level: Garbh-INI Program
Mains level: NA
Central idea: The scientists working in the Garbh-Ini program have identified 19 single nucleotide polymorphisms (SNPs) or genetic markers that are associated with preterm or premature birth.
What is Garbh-Ini?
- It is an interdisciplinary research program in India that focuses on the advanced research of birth outcomes.
- It is a collaborative initiative under the Department of Biotechnology.
- It is led by DBT-Translational Health Science and Technology Institute (THSTI) in the NCR Biotech cluster, Faridabad, in collaboration with DBT-NIBMG, Kalyani, DBT-Regional Centre for Biotechnology (RCB), Gurugram Civil Hospital, and other organizations.
- The program aims to use advanced technology to improve maternal and child health outcomes and address the high incidence of preterm births in India.
What are Single Nucleotide Polymorphisms (SNPs)?
- Genetic markers are specific sequences of DNA that can be used to identify an individual or a particular trait.
- Single nucleotide polymorphisms (SNPs) are the most common type of genetic variation that occurs in the DNA sequence.
- SNPs occur when a single nucleotide (A, C, T, or G) in the DNA sequence is altered.
- These changes can occur in any region of the genome and can be used as genetic markers to identify specific traits or disease susceptibility.
Significance of the Study
- The study is significant as it identifies 19 SNPs or genetic markers that are associated with preterm or premature birth.
- Out of these 19 SNPs, five were found to be associated with an increased risk of early preterm birth (birth before 33 weeks) and can be used to predict premature births.
- This is the first study in South Asia to identify genetic markers associated with preterm births, and it has significant implications for improving maternal and child health outcomes in India.
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Note4Students
From UPSC perspective, the following things are important :
Prelims level: Heat Budget of Earth
Mains level: Read the attached story
The study published in the journal Earth System Science Data estimates that almost 90% of the warming that has occurred in the last 50 years has been absorbed by the ocean, with the remaining heat absorbed by the land, cryosphere and atmosphere.
Earth’s energy balance: A quick recap
- It is the balance between the amount of energy that Earth receives from the Sun and the amount of energy that Earth radiates back into space.
- It is also known as the radiation budget.
- The energy from the Sun that Earth receives is mainly in the form of visible light and ultraviolet radiation.
- This energy is absorbed by the Earth’s surface and atmosphere, which then radiate it back into space in the form of infrared radiation.
- The balance between incoming and outgoing radiation is crucial for maintaining the Earth’s temperature and climate.
- Any imbalance between the two can lead to global warming and climate change.
|
Description |
| Total incoming solar radiation |
Approximately 342 W/m² reaches Earth’s atmosphere |
| Albedo |
About 30% of incoming solar radiation is reflected back to space |
| Greenhouse effect |
Remaining 70% of incoming solar radiation is absorbed by Earth’s surface and atmosphere, creating the greenhouse effect |
| Atmospheric heat |
Atmosphere contains only 0.001% of Earth’s heat energy, but is crucial in regulating heat budget |
Key highlights of the Study: Heat Accumulation
- The study estimates that approximately 381 zettajoules (ZJ) of heat accumulated on the planet from 1971-2020 due to anthropogenic emissions.
- This roughly equals a heating rate of approximately 0.48 watts per square metre (Earth Energy Imbalance or EEI). EEI is the difference between incoming and outgoing solar radiation.
- According to the study, about 89% of the accumulated heat is stored in the ocean, 6% on land, a percent in the atmosphere, and about 4% available for melting the cryosphere.
Implications
(1) Land Heat Accumulation
- Heat accumulated on land drives up ground surface temperatures, which may increase soil respiration, releasing carbon dioxide in the process.
- Higher soil respiration will likely decrease soil water, depending on climatic and meteorological conditions and factors.
(2) Inland Water Bodies and Permafrost Thawing
- Heat storage within inland water bodies has increased to roughly 0.2 ZJ since 1960. For permafrost thawing, it was about 2 ZJ.
- The accumulation of heat in inland water increases lake water temperatures, making conditions ripe for algal blooms.
- Permafrost heat content could inject methane and carbon dioxide into the atmosphere, the researchers warned.
(3) Ocean and Troposphere heating
- The upper ocean (0-300 and 0-700 meters depth) has taken up a major fraction of heat, according to the new estimates.
- During 2006-2020, ocean warming rates for the 0-2,000 meters depth reached record rates of roughly 1.03 watts per square meter.
- The troposphere is also warming up due to increased heat accumulation.
(4) Cryosphere heating
- The cryosphere – the frozen water part of the Earth system – gained roughly 14 ZJ of heat from 1971-2020.
- Half of the uptake triggered the melting of grounded ice, while the remaining half is linked to the melting of floating ice.
- The Antarctic Ice Sheet contributed about 33% to the total cryosphere heat gain, while Arctic sea ice stood second, having contributed 26%.
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Note4Students
From UPSC perspective, the following things are important :
Prelims level: EELS Mission
Mains level: NA
NASA is developing a snake-like robot- Exobiology Extant Life Surveyor (EELS), which it says can boost space exploration through its diverse adaptability to various terrains.
Exobiology Extant Life Surveyor (EELS)
|
Details |
| Purpose |
Designed to explore internal and enclosed dynamic terrain structures to assess evidence for life. |
| Focus |
To explore ocean-world-inspired terrain, and besides Enceladus, it can explore Martian polar caps and descending crevasses in Earth’s ice sheets. |
| Enceladus and EELS system |
Enceladus is a small and icy body, and the Cassini spacecraft dubbed it to be one of the most scientifically interesting destinations in the solar system. |
| Scientific investigations |
Work is underway to identify high-priority and high-impact scientific investigations to show the capabilities of the snake-like robot. |
Features of EELS Robot
|
Details |
| Propulsion and gripping mechanism |
EELS robot has an actuation and propulsion mechanism, driven by power and communication electronics.
It uses a rotating propulsion unit that acts as tracks, while the gripping mechanism and propeller unit help it to access a plume vent exit. |
| Adaptability |
The robot’s adaptability to various terrains and its unique features make it capable of exploring areas that were once inaccessible. |
| Enceladus |
Geyser-like jets spew water vapor and ice particles from an underground ocean beneath Enceladus’s icy crust, making it a promising lead for NASA in its search for life. |
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Note4Students
From UPSC perspective, the following things are important :
Prelims level: INIOCHOS-23
Mains level: NA
The Indian Air Force (IAF) will be participating in a multi-national air exercise called Exercise INIOCHOS-23, which will be hosted by the Greece Air Force.
Ex. INIOCHOS-23
- Exercise INIOCHOS-23 will be conducted at the Andravida Air Base in Greece.
- The IAF will be participating with four Su-30 MKI and two C-17 aircraft.
- The objective of the exercise is to enhance international cooperation, synergy, and interoperability among the participating Air Forces, as stated by the IAF in a statement.
Strategic significance
- The exercise will be conducted in a realistic combat scenario involving multiple types of air and surface assets
- This will provide valuable insight into each other’s best practices and enable the participating contingents to interact professionally.
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Note4Students
From UPSC perspective, the following things are important :
Prelims level: Windfall Tax
Mains level: Not Much
The government has revised a windfall tax on domestically-produced crude oil. According to an official notification, the windfall tax rate of Rs 6,400 per tonne.
What is a Windfall Tax?
- Windfall taxes are designed to tax the profits a company derives from an external, sometimes unprecedented event — for instance, the energy price-rise as a result of the Russia-Ukraine conflict.
- These are profits that cannot be attributed to something the firm actively did, like an investment strategy or an expansion of business.
- The US Congressional Research Service (CRS) defines a windfall as an “unearned, unanticipated gain in income through no additional effort or expense”.
- One area where such taxes have routinely been discussed is oil markets, where price fluctuation leads to volatile or erratic profits for the industry.
Features of Windfall Tax
- Imposed on unanticipated and unearned gains: Windfall tax is imposed on the profits or gains that a company earns from external events or factors beyond their control, which they did not actively seek or pursue.
- One-time tax: It is typically imposed as a one-time tax retrospectively, over and above the normal rates of tax, and is not a regular or ongoing tax.
- Imposed on specific sectors or industries: Windfall taxes are usually imposed on specific sectors or industries where there is a significant increase in profits due to external factors such as price fluctuations, supply disruptions, or changes in regulations.
- Rationale for imposition: The imposition of windfall taxes is based on the rationale of redistributing unexpected gains, funding social welfare schemes, and creating a supplementary revenue stream for the government.
- Design problems: Introducing windfall taxes may suffer from design problems, given their expedient and political nature.
- Potential impact on investment: Windfall taxes may lead to uncertainty in the market and negatively impact future investment, as companies may feel uncertain about investing in a sector with an unstable tax regime.
When did India introduce this?
- In July 2022, India announced a windfall tax on domestic crude oil producers who it believed were reaping the benefits of the high oil prices.
- It also imposed an additional excise levy on diesel, petrol and air turbine fuel (ATF) exports.
- Also, India’s case was different from other countries, as it was still importing discounted Russian oil.
How is it levied?
- Governments typically levy this as a one-off tax retrospectively over and above the normal rates of tax.
- The Central government has introduced a windfall profit tax of ₹23,250 per tonne on domestic crude oil production, which was subsequently revised fortnightly four times so far.
- The latest revision was on August 31, when it was hiked to ₹13,300 per tonne from ₹13,000.
Reasons for re-introduction
- There have been varying rationales for governments worldwide to introduce windfall taxes like:
- Redistribution of unexpected gains when high prices benefit producers at the expense of consumers,
- Funding social welfare schemes, and
- Supplementary revenue stream for the government
Issues with imposing such taxes
- Design problems: Windfall taxes may suffer from design problems, given their expedient and political nature. There is also the issue of determining what constitutes true windfall profits and who should be taxed, which raises questions about the threshold for exemption of smaller companies.
- Potential impact on investment: Windfall taxes may lead to uncertainty in the market and negatively impact future investment, as companies may feel uncertain about investing in a sector with an unstable tax regime.
- Internalization of potential taxes: Introducing a temporary windfall profit tax may reduce future investment since prospective investors may internalize the likelihood of potential taxes when making investment decisions.
- Threshold for exemption of smaller companies: Determining the threshold for exemption of smaller companies raises questions about which companies should be taxed and what level of profit is normal or excessive.
- Difficulty in determining true windfall profits: There is also the issue of determining what constitutes true windfall profits, as it may be challenging to differentiate between profits attributable to external events versus those attributable to a company’s active investment strategy or business expansion.
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Note4Students
From UPSC perspective, the following things are important :
Prelims level: Web 3.0
Mains level: Not Much
Central idea: The article discusses the key features of Web3, including its decentralized nature, peer-to-peer transactions, and greater control over data and digital assets for users.
What is Web3?
- Web3, also known as Web 3.0, is the next generation of the World Wide Web that emphasizes decentralization, security, and user privacy.
- It is essentially a vision of the internet where users have more control over their data, identities, and online interactions.
- It is built on blockchain technology, which enables peer-to-peer transactions without the need for intermediaries such as banks, governments, or other third parties.
- This decentralized approach to the web allows for greater transparency and trust, as well as more secure and private transactions.
- Web3 technologies include blockchain platforms like Ethereum, IPFS (InterPlanetary File System) for distributed file storage, decentralized identity systems like uPort, and decentralized marketplaces like OpenBazaar.
Features of Web 3
Feature
|
Web3
|
Web2
|
|
Centralisation
|
Decentralised |
Centralised |
|
Intermediaries
|
Peer-to-peer |
Rely on intermediaries |
|
Data ownership and control
|
Users have control |
Large corporations have control |
Challenges for Web3:
|
Challenge
|
Scalability
|
Current blockchain infrastructure can only handle a limited number of transactions per second. |
User Adoption
|
Despite being around for over a decade, blockchain technology is still relatively unknown to the general public. |
Interoperability
|
Web3 is being developed by different organisations, each with their own unique vision for the technology, leading to challenges in integration. |
Complexity
|
Technical expertise is required to use and understand Web3, which may be a barrier for some users. |
Examples of Web3 use:
|
Use
|
|
Cryptocurrencies
|
Built on blockchain technology, cryptocurrencies enable secure, decentralised transactions without the need for intermediaries. |
|
Decentralised Finance
|
Aims to build a new financial system on top of blockchain technology. DeFi applications enable users to borrow, lend, and trade crypto. |
|
Decentralised storage
|
Used to create decentralised social networks and develop decentralised identity verification systems. |
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