Note4Students
From UPSC perspective, the following things are important :
Prelims level: Tripuri Handloom
Mains level: Not Much

Tripura CM has of late made a statement to sport the Risa, a customary hand-woven cloth used by Tripura’s indigenous tribal communities.
Try this PYQ:
Q.Consider the following pairs:
Sr. |
Tradition |
|
State |
1. |
Chapchar Kut festival |
: |
Mizoram |
2. |
Khongjom Parba ballad |
: |
Manipur |
3. |
Thang-Ta dance |
: |
Sikkim |
Which of the pairs given above is/are correct? (CSP 2018)
a) 1 only
b) 1 and 2
c) 3 only
d) 2 and 3
What is Risa?
- Risa is one of the three parts of customary Tripuri female attire, the other two being the Rignai and Rikutu.
- The Risa, which is essentially a customary hand-woven cloth, is used as headgear, stole, female upper cloth or presented to honour a distinguished recipient.
- The Rignai is primarily used to cover the lower part of the body and literally translates into ‘to wear’. The Rituku covers the upper half of the body, wrapping it all around.
- However, it is also used as a ‘chunri’ or a ‘pallu’ of the Indian saree. It is also used to cover the head of newly married Tripuri women.
Its cultural significance
- Apart from its beautiful designs, the Risa plays a host of crucial social utilities.
- Adolescent Tripuri girls are first given Risa to wear when she reaches 12-14 years in an event called Risa Sormani.
- The event involves prayers to a Lampra god, where her elder women pray for her wellbeing throughout her life.
- However, it is also used in religious festivals like the Garia Puja, a customary festival of the tribal communities, or as a head turban by male folks during weddings and festivals, as a cummerbund over dhoti or headscarf.
- The cloth is even used as a makeshift baby carrier on the mother’s back.
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Note4Students
From UPSC perspective, the following things are important :
Prelims level: 5G technology
Mains level: 5G technology and its rollout
The Department of Telecommunications (DoT) has sought inputs from telcos and other industry experts on the sale and use of radiofrequency spectrum over the next 10 years, including the 5G bands.
Try this PYQ:
Q. In India, which of the following review the independent regulators in sectors like telecommunications, insurance, electricity, etc.?
- Ad Hoc Committees set up by the Parliament
- Parliamentary Department Related Standing Committees
- Finance Commission
- Financial Sector Legislative Reforms Commission
- NITI Aayog
Select the correct answer using the code given below:
(a) 1 and 2
(b) 1, 3 and 4
(c) 3, 4 and 5
(d) 2 and 5
What is 5G technology?
- 5G or fifth generation is the latest upgrade in the long-term evolution (LTE) mobile broadband networks.
- It mainly works in 3 bands, namely low, mid and high-frequency spectrum — all of which have their own uses as well as limitations.
Three bands of 5G
- The low band spectrum has shown great promise in terms of coverage and speed of internet and data exchange, the maximum speed is limited to 100 Mbps (Megabits per second).
- This means that while telcos can use and install it for commercial cellphones users who may not have specific demands for very high-speed internet, the low band spectrum may not be optimal for specialised needs of the industry.
- The mid-band spectrum, on the other hand, offers higher speeds compared to the low band but has limitations in terms of coverage area and penetration of signals.
- Telcos and companies, which have taken the lead on 5G, have indicated that this band may be used by industries and specialised factory units for building captive networks that can be moulded into the needs of that particular industry.
- The high-band spectrum offers the highest speed of all the three bands, but has extremely limited coverage and signal penetration strength.
- Internet speeds in the high-band spectrum of 5G have been tested to be as high as 20 Gbps (gigabits per second), while, in most cases, the maximum internet data speed in 4G has been recorded at 1 Gbps.
Where does India stand in the 5G technology race?
- On par with the global players, India had, in 2018, planned to start 5G services as soon as possible, with an aim to capitalize on the better network speeds and strength that the technology promised.
- Indian private telecom players have been urging the DoT to lay out a clear road map of spectrum allocation and 5G frequency bands so that they would be able to plan the rollout of their services accordingly.
- One big hurdle, however, is the lack of flow of cash and adequate capital with some companies due to their AGR dues.
Global progress on 5G
- More than governments, global telecom companies have started building 5G networks and rolling it out to their customers on a trial basis.
- In countries like the US, some companies have taken the lead when it comes to rolling out commercial 5G for their users.
- A South Korean company, which had started researching on 5G technology way back in 2011, has, on the other hand, take the lead when it comes to building the hardware for 5G networks for several companies.
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Note4Students
From UPSC perspective, the following things are important :
Prelims level: Thiruvalluvar
Mains level: Sangam Literature

The Prime Minister has extended his venerations to Thiruvalluvar on the Thiruvalluvar Day.
Read everything about Sangam Literature from your basic sources.
Who was Thiruvalluvar?
- Thiruvalluvar is fondly referred to as Valluvar by Tamils was born during 4th -5th century CE.
- His ‘Thirukkural’, a collection of 1,330 couplets (‘kurals’ in Tamil), are an essential part of every Tamil household.
- It holds importance in the same way the Bhagavad Gita or the Ramayana are in traditional North Indian Hindu households.
- Thiruvalluvar is revered as an ancient saint, poet, and a philosopher by Tamils, irrespective of their religion.
- He is an essential anchor for Tamils in tracing their cultural roots; Tamils are taught to learn his couplets word-for-word and to follow his teachings in their day-to-day living.
Also read:
Sangam era older than previously thought, finds study
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Note4Students
From UPSC perspective, the following things are important :
Prelims level: Curiosity rover, Martian Day
Mains level: Quest for extraterrestrial life

The Mars rover ‘Curiosity’ has completed 3,000 Martian days.
Try this PYQ:
Q.Which region of Mars has a densely packed river deposit indicating this planet had water 3.5 billion years ago?
(a) Aeolis Dorsa
(b) Tharsis
(c) Olympus Mons
(d) Hellas
Curiosity Rover
- Curiosity is an SUV-sized Mars rover designed to explore the Gale crater on Mars as part of NASA’s Mars Science Laboratory (MSL) mission
- The main mission of Curiosity was “to search areas of Mars for past or present conditions favourable for life, and conditions capable of preserving a record of life.”
- It has a suite of instruments:
- A gas chromatograph, a mass spectrometer, a tunable laser spectrometer, X-ray diffraction, fluorescence instrument help study the rocks
- The Mars Hand Lens Imager (for close-up pictures) and a Mast Camera (to take photos of the surroundings)
- An instrument named ChemCam to vaporize thin layers of Martian rocks.
- Radiation Assessment Detector to study the radiation environment at the surface of Mars
- Rover Environmental Monitoring Station to measure atmospheric pressure, temperature, humidity, winds, plus ultraviolet radiation levels
- Dynamic Albedo of Neutrons instrument to measure subsurface hydrogen
Back2Basics: Martian Day/ Sol
- Coincidentally, the duration of a Martian day aka ‘Sol’ is within a few per cent of that of an Earth day, which has led to the use of analogous time units.
- A sol is slightly longer than an Earth day. It is approximately 24 hours, 39 minutes, 35 seconds long.
- A Martian year is approximately 668 sols, equivalent to approximately 687 Earth days.
- Mars has an axial tilt and a rotation period similar to those of Earth.
- Thus, it experiences seasons of spring, summer, autumn and winter much like Earth.
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Note4Students
From UPSC perspective, the following things are important :
Prelims level: Sulawesi Cave Paintings
Mains level: Not Much

A team of archaeologists in Indonesia has discovered what may be the world’s oldest known cave painting dating back to more than 45,000 years.
Try this PYQ:
Q.There are only two known examples of cave paintings of the Gupta period in ancient India. One of these is paintings of Ajanta caves. Where is the other surviving example of Gupta paintings?
(a) Bagh caves
(b) Ellora caves
(c) Lomas Rishi cave
(d) Nasik caves
Sulawesi Cave Paintings
- The cave painting depicts a wild boar endemic to the Sulawesi island of Indonesia, where the painting was found.
- The central Indonesian island, which occupies an area of over 174,000 sq. km, is situated between Asia and Australia.
- It has a long history of human occupation.
Significance of the painting
- The archaeologists’ note that the dated painting of the Sulawesi warty pig seems to be the world’s oldest surviving representational image of an animal.
- The painting was made using red ochre pigment and depicts a pig with a short crest of upright hairs and a pair of horn-like facial warts in front of the eyes.
- These pigs have been hunted by humans for tens of thousands of years and are the most commonly depicted animal in the ice age rock art of the island.
- It suggests that they have long been used as food and form a “focus of creative thinking and artistic expression” for people of that time.
Must read:
Chapter 1 | Stone Age – Paleolithic, Mesolithic and Neolithic
How did the archaeologists date it?
- The painting was first discovered in 2017 as part of surveys the team was carrying out with the Indonesian authorities.
- For these painting archaeologists used a method called U-series isotope analysis, which uses calcium carbonate deposits that form naturally on the cave wall surface to determine its age.
- They used a calcium carbonate deposit, also referred to as “cave popcorn” that had formed on the rear foot of one of the pig figures.
- They were able to figure out a minimum age for the painting at around 45,500 years, which means the painting was made before this.
Sulawesi: Oldest human habitat
Try memorizing these Islands of the Indo-Pacific in their East-West alternations.
- Sulawesi island contains some of the oldest directly dated rock art in the world and also some of the oldest evidence for the presence of hominins beyond the southeastern limits of the Ice Age Asian continent.
- Hominins include modern humans, extinct human species and our immediate ancestors.
- Homo sapiens are the first modern humans who evolved from their hominid predecessors between 200,000-300,000 years ago.
- It is estimated that these modern humans started migrating outside of Africa some 70,000-100,000 years ago.
- Even so, it is not yet clear as to when modern humans first colonised Sulawesi.
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Note4Students
From UPSC perspective, the following things are important :
Prelims level: Kashmiri papier-mache
Mains level: NA

This newscard is an excerpt of the original article published in The Hindu.
Tap to know about other Geographical Indicators in news.
Kashmiri papier-mache
- It is a handicraft of Kashmir that was brought by Muslims saint Mir Sayyid Ali Hamadani from Persia in the 14th century to medieval India.
- It is based primarily on paper pulp, and is a richly decorated, colourful artefact; generally in the form of vases, bowls, or cups (with and without metal rims), boxes, trays, bases of lamps, and many other small objects.
- These are made in homes, and workshops, in Srinagar, and other parts of the Kashmir Valley, and are marketed primarily within India, although there is a significant international market.
- The product is protected under the Geographic Indication Act 1999 and was registered by the Controller General of Patents Designs and Trademarks.
Back2Basics: Geographical Indication (GI)
- The World Intellectual Property Organisation defines a GI as “a sign used on products that have a specific geographical origin and possess qualities or a reputation that are due to that origin”.
- GIs are typically used for agricultural products, foodstuffs, handicrafts, industrial products, wines and spirit drinks.
- Internationally, GIs are covered as an element of intellectual property rights under the Paris Convention for the Protection of Industrial Property.
- They have also covered under the Trade-Related Aspects of Intellectual Property Rights (TRIPS) Agreement.
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Note4Students
From UPSC perspective, the following things are important :
Prelims level: Mutual Funds
Mains level: Mutual Funds and associated market risks

The capital markets regulator Securities and Exchange Board of India (SEBI) has made it mandatory for mutual funds to assign a risk level to schemes, based on certain parameters.
Try this PYQ:
Q.Which of the following is issued by registered foreign portfolio investors to overseas investors who want to be part of the Indian stock market without registering themselves directly?
(a) Certificate of Deposit
(b) Commercial Paper
(c) Promissory Note
(d) Participatory Note
What are Mutual Funds?
- A Mutual Fund is a trust that collects money from a number of investors who share a common investment objective.
- Then, it invests the money in equities, bonds, money market instruments and/or other securities.
- Each investor owns units, which represent a portion of the holdings of the fund.
- The income/gains generated from this collective investment are distributed proportionately amongst the investors after deducting certain expenses, by calculating a scheme’s “Net Asset Value or NAV.
- It is one of the most viable investment options for the common man as it offers an opportunity to invest in a diversified, professionally managed basket of securities at a relatively low cost.
- All funds carry some level of risk. With mutual funds, one may lose some or all of the money invested because the securities held by a fund can go down in value.
What is the risk-o-meter?
- All mutual funds shall beginning January 1, assign a risk level to their schemes at the time of launch, based on the scheme’s characteristics.
- SEBI’s decision on the “risk-o-meter”, characterizes the risk level of the schemes on a six-stage scale from “Low” to “Very High”.
- The risk-o-meter must be evaluated on a monthly basis.
A compulsory mandate
- Fund houses are required to disclose the risk-o-meter risk level along with the portfolio disclosure for all their schemes on their own websites as well as the website of the Association of Mutual Funds in India (AMFI) within 10 days of the close of each month.
- Any change in the risk-o-meter reading with regard to a scheme shall be communicated to the unit-holders of that scheme.
How will the level of risk be assigned?
- Which one of the six risk levels — low, low to moderate, moderate, moderately high, high, and very high — would apply, would depend upon the risk value (less than 1 for low risk to more than 5 for very high risk) calculated for the scheme.
- So if the risk value of a scheme is less than 1, its risk level would be low, and if it is more than 5, the risk will be very high on the risk-o-meter.
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Note4Students
From UPSC perspective, the following things are important :
Prelims level: Black Holes, Recoils
Mains level: Black holes and gravitation waves

A supermassive black hole, which is estimated to weigh up to 100 billion times the mass of the Sun, is seemingly missing, leaving astronomers perplexed.
Try this PYQ:
Q.Recently, scientists observed the merger of giant ‘blackholes’ billions of light-years away from the Earth. What is the significance of this observation?
(a) ‘Higgs boson particles’ were detected.
(b) ‘Gravitational waves’ were detected.
(c) Possibility of inter-galactic space travel through ‘wormhole’ was confirmed.
(d) It enabled scientists to understand ‘singularity’.
The ‘missing’ black hole
- The black hole is supposed to be located in Abell 2261, an enormous galaxy cluster that is about 2.7 billion light-years away from our planet.
- So, when we look at a celestial object, we are looking at how it appeared that long ago in the past.
- At 2.7 billion light-years away, the Abell galaxy is at an overwhelmingly large distance away from us.
What could have happened?
- Every large galaxy in the universe has a supermassive black hole at its centre, whose mass is millions or billions of times that of the Sun, says NASA.
- The black hole at the centre of our galaxy– the Milky Way– is called Sagittarius A*, and is 26,000 light-years away from Earth.
- Scientists have been using data gathered in 1999 and 2004 to look for the centre of the Abell galaxy, but have so far been unable to find its black hole.
- A reason for this could be that Abell’s black hole has been ejected from the centre of the galaxy.
Recoil of Black Holes
- When two black holes merge, they release what is known as gravitational waves– invisible ripples travelling at the speed of light, which squeeze and stretch anything in their path.
- As per the theory of gravitational waves, during such a merger, when the amount of waves generated in one direction is stronger than another, the new big black hole can be sent away from the centre of the galaxy into the opposite direction.
- This is known as a “recoiling” black hole.
- So far, though, scientists are yet to find definitive evidence for recoiling black holes and are still to discover whether supermassive black holes can merge and release gravitational waves.
- As of now, only mergers of significantly smaller black holes have been verified.
Why it is significant?
- The researchers assert that this may have happened because of the merging of two smaller galaxies to form Abell– a process in which both of their black holes merged to form an even bigger black hole.
- If this hypothesis turns out to be true, it would mean a major breakthrough in astronomy.
Back2Basics:

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Note4Students
From UPSC perspective, the following things are important :
Prelims level: Lithium ion batteries and their significance
Mains level: Lithium reserves in India
Alongside a move to tap into the global lithium value chain, India has initiated a concerted domestic exploration in Karnataka’s Mandya district.
Lithium reserves in Karnataka
- Preliminary surveys by the Atomic Minerals Directorate for Exploration and Research (AMD), an arm of the Department of Atomic Energy has carried out the exploration.
- AMD is carrying out surface and sub-surface exploration for lithium in potential geological domains of the country.
- Their research has shown the presence of 1,600 tonnes of lithium resources in the igneous rocks of the Marlagalla-Allapatna region of Karnataka’s Mandya district.
Must read:
Global producers of lithium
- Australia and Chile have swapped positions as the world’s leading lithium-producing country over the past decade. In 2019, the world’s Top 5 lithium producers were:
- Australia – 52.9% of global production
- Chile – 21.5%
- China – 9.7%
- Argentina – 8.3%
- Zimbabwe – 2.1%
- The U.S. ranked 7th with 1.2% of the world’s lithium production.
In 2019, the world’s Top 5 lithium reserves by country were:
-
Chile – 55.5% of the world’s total
-
Australia – 18.1%
-
Argentina – 11.0%
-
China – 6.5%
-
U.S. – 4.1%
Why is the exploration significant?
- India currently imports all its lithium needs.
- The find in Mandya is extremely small in quantitative terms, but it marks some initial success in the attempt to domestically mine the silver-white metal by way of hard-rock extraction of the ore.
- The domestic exploration push comes at a time when India has stepped up its economic offensive against China, a major source of lithium-ion energy storage products being imported into the country.
- The Marlagalla-Allapatna area is seen as among the most promising geological domains for potential exploration for lithium and other rare metals.
What lies ahead?
- India is seen as a late mover in attempts to enter the lithium value chain, coming at a time when EVs are predicted to be a sector ripe for disruption.
- 2021 is likely to be an inflexion point for battery technology – with several potential improvements to the li-ion technology, and alternatives to this tried-and-tested formulation in advanced stages of commercialization.
Back2Basic: Li-Ion battery

- Whittingham developed the first functional lithium-ion battery in 1976, Goodenough brought in a major improvement in 1980, while Yoshino made the first practical-use lithium-ion battery in 1985.
- Commercially manufactured lithium-ion batteries, based on what Yoshino had developed, made their first appearance in 1991.
Its’ working
- Batteries convert chemical energy into electricity.
- A battery comprises two electrodes, a positive cathode and a negative anode, which is separated by a liquid chemical, called an electrolyte, which is capable of carrying charged particles.
- The two electrodes are connected through an electrical circuit.
- When the circuit is on, electrons travel from the negative anode towards the positive cathode, thus generating an electric current, while positively charged ions move through the electrolyte.
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Note4Students
From UPSC perspective, the following things are important :
Prelims level: Magnetotelluric Study
Mains level: Earthquakes
In the backdrop of multiple quakes of low intensity in the Delhi-NCR region, the National Centre for Seismology (NCS) is conducting a unique geophysical Magnetotelluric-MT survey to accurately assess potential seismic hazards.
Try this PYQ:
Q.Consider the following statements:
- The Earth’s magnetic field has reversed every few hundred thousand years.
- When the Earth was created more than 4000 million years ago, there was 54% oxygen and no carbon dioxide.
- When living organisms originated, they modified the early atmosphere of the Earth.
Which of the statements given above is/ are correct?
(a) 1 only
(b) 2 and 3 only
(c) 1 and 3 only
(d) 1, 2 and 3
What is Magneto-Telluric Survey?

- MT is a geophysical method which uses natural time variation of the earth’s magnetic and electric fields to understand the geological (underground) structure and processes.
- It is an increasingly popular technique widely used to image the electrical resistivity distribution inside the Earth in various application fields ranging in scale from the shallow crust to the lithosphere.
- In the MT method, the earth’s natural electromagnetic field is used as a source field.
- The receivers record the electric and magnetic fields on the surface of the Earth.
- The variations in amplitude and phase of the received signals can be interpreted in terms of the resistivity structure of the subsurface using the magnetotelluric impedance.
Where would the MT survey be undertaken?
- The survey is conducted across three major seismic sources, namely Mahendragarh-Dehradun Fault (MDF), Sohna Fault (SF) and Mathura Fault (MF).
- It will ascertain the presence of fluids, which generally enhance the possibility of triggering earthquakes.
Benefits of the survey
- Its findings will help different user agencies for designing quake-resistant buildings, industrial units and structures such as hospitals and schools.
- In addition to MT, analysis and interpretation of satellite imageries and geological field investigations for locating the faults are also being carried out.
- Both these geophysical and geological surveys will help in taking multiple preventive measures in the quake-prone region.
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Note4Students
From UPSC perspective, the following things are important :
Prelims level: Asian Waterbird Census (AWC) 2021
Mains level: Wetland conservation in India
The two-day Asian Waterbird Census-2020 was recently held in Andhra Pradesh.
Anyone can participate!
By using eBird and filling an additional site form, one can take part in this multi-country effort to document the state of our wetlands and waterbirds. To take part one simply visits a wetland and count the birds he/she see there.
Asian Waterbird Census
- The Asian Waterbird Census (AWC) takes place every January.
- The AWC was started in 1987, and many birders were initiated into bird counting and monitoring through this project.
- This citizen-science event is a part of the global International Waterbird Census (IWC) that supports the conservation and management of wetlands and waterbirds worldwide.
- The data collected each year is shared by Wetlands International with global conservation organisations such as IUCN and Ramsar Convention.
Why need such census?
- Waterbirds are one of the key indicators of wetlands health.
- Wetlands provide feeding, resting, roosting and foraging habitats for these charismatic species.
AWC in India
- In India, the AWC is annually coordinated by the Bombay Natural history Society (BNHS) and Wetlands International.
- BNHS is a non-government Organisation (NGO) founded in the year 1883.
- It engages itself in the conservation of nature and natural resources and also in the research and conservation of endangered species.
- Its mission is to conserve nature, primarily biological diversity through action based on research, education and public awareness.
Back2Basics: Waterbirds
- The term water bird, alternatively waterbird or aquatic bird is used to refer to birds that live on or around water.
- In some definitions, the term is especially applied to birds in freshwater habitats, though others make no distinction from birds that inhabit marine environments.
- Also, some water birds are more terrestrial or aquatic than others, and their adaptations will vary depending on their environment.
- These adaptations include webbed feet, bills, and legs adapted to feed in the water, and the ability to dive from the surface or the air to catch prey in water.
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Note4Students
From UPSC perspective, the following things are important :
Prelims level: Dmitri Mendeleev, Periodic table
Mains level: NA

Mendeleev was a Russian chemist and inventor who formulated the Periodic Law and the Periodic Table of Elements.
Chemistry can, no wonder, find their place in exam if core Biology could do in 2020 CSP.
Q.Which of the following statements is/are correct regarding the general difference between plant cells and animal cells?
- Plant cells have cellulose cell walls whilst animal cells do not.
- Plant cells do not have plasma membrane unlike animals cells which do
- Mature plant cell has one large vacuole whilst animal cell has many small vacuoles
Select the correct answer using the given code below-
(a) 1 and 2 only
(b) 2 and 3 only
(c) 1 and 3 only
(d) 1, 2 and 3
Dmitri Mendeleev
- Mendeleev was born in the Siberian town of Tobolsk.
- In 1861, Mendeleev published a textbook named Organic Chemistry, which won him the Demidov Prize of the Petersburg Academy of Sciences.
- While explaining the chemical and physical properties of elements, he discovered similarities in the progression of atomic weights.
- He found that the order of atomic weights could be used to arrange the elements within each group and the groups themselves.
- Thus, Mendeleev formulated the periodic law. His Osnovy khimii (The Principles of Chemistry) became a classic, running through many editions and many translations.
The Periodic Law
- Using the Periodic Law, Mendeleev developed a systematic table of all the 63 elements then known.
- He even predicted the locations of unknown elements together with their properties within the periodic table.
- When these predicted elements, notably gallium ( 1875), scandium (1879), and germanium (1886) were discovered, Mendeleev Periodic Table began to gain wide acceptance.
- Incidentally, in 1870, German chemist Julius Lothar Meyer also published a paper describing the same organisation of elements as Mendeleev’s. But the latter is given credit for the table.
- In all, Mendeleev predicted 10 new elements, of which all but two turned out to exist. Element 101 is named Mendelevium in his honour.
Also read:
Mendeleev and his periodic table of elements
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Note4Students
From UPSC perspective, the following things are important :
Prelims level: Grand Ethiopian Renaissance Dam
Mains level: Horn of Africa Region

Ethiopia, Sudan and Egypt have agreed on to resume negotiations to resolve their decade-long complex dispute over the Grand Renaissance Dam hydropower project in the Horn of Africa.
Note: You never know when UPSC might switch map based questions away from the Middle East and SE Asia.
Considering this news, the UPSC may ask a prelim question based on the countries swept by River Nile/ various dams constructed/ landlocked countries in the African continent etc.
Also read
[Burning Issue] Ethiopian Crisis and the Geopolitics
Grand Ethiopian Renaissance Dam
- Spearheaded by Ethiopia, the 145-meter-tall (475-foot-tall) Grand Renaissance Dam hydropower project, when completed, will be Africa’s largest.
- Its construction was initiated in 2011 on the Blue Nile tributary of the river that runs across one part of Ethiopia.
- The Nile is a necessary water source in the region and Egypt has consistently objected to the dam’s construction, saying it will impact water flow.
- The long-standing dispute has been a cause of concern for international observers who fear that it may increase conflict between the two nations and spill out into other countries in the Horn of Africa.
What is the dispute about?
- The Nile, Africa’s longest river, has been at the centre of a decade-long complex dispute involving several countries that are dependent on the river’s waters.
- At the forefront of this dispute are Ethiopia and Egypt, with Sudan having found itself dragged into the issue.
- The main waterways of the Nile run through Uganda, South Sudan, Sudan and Egypt, and its drainage basin runs through several countries in East Africa, including Ethiopia.
Concerns over the dam
- Given the dam’s location on the Blue Nile tributary, it would potentially allow Ethiopia to gain control of the flow of the river’s waters.
- Egypt lies further downstream and is concerned that Ethiopia’s control over the water could result in lower water levels within its own borders.
- In addition, Egypt proposed a longer timeline for the project over concerns that the water level of the Nile could dramatically drop as the reservoir fills with water in the initial stages.
- Sudan’s location between Egypt up north and Ethiopia down south has caused it to become an inadvertent party to this dispute.
- But that isn’t all; Sudan to is concerned that if Ethiopia were to gain control over the river, it would affect the water levels Sudan receives.
Why does Ethiopia want this dam?
- Ethiopia’s goal is to secure electricity for its population and to sustain and develop its growing manufacturing industry.
- Addis Ababa anticipates that this dam will generate approximately 6,000 megawatts of electricity when it is completed, that can be distributed for the needs of its population and industries.
- In addition to its domestic requirements, Ethiopia may sell surplus electricity to neighbouring nations like Kenya, Sudan, Eritrea and South Sudan, that also suffer from electricity shortages, to generate some revenue.
What lies ahead?
- Despite previous talks, the point of contention hasn’t changed: Egypt and Sudan are concerned about the filling and the operation of the dam.
- Ethiopia continues to insist that the dam is required to meet the needs of its population and has said that downstream water supplies will not be adversely affected.
- Cairo insists that the dam would cut its water supplies — concerning for a country that depends on the Nile for approximately 97% of its drinking water and irrigation supplies.
- Sudan believes that the dam will reduce flooding, but is concerned about the path forward if the negotiations end at a stalemate.
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Note4Students
From UPSC perspective, the following things are important :
Prelims level: Trans fats
Mains level: Health threats posed by Trans Fats
The Food Safety and Standards Authority of India (FSSAI) has capped the amount of trans fatty acids (TFA) in oils and fats to 3% for 2021 and 2% by 2022 from the current permissible limit of 5%.
New FSSAI norms
- FSSAI has acted in response to the amendment to the Food Safety and Standards (Prohibition and Restriction on Sales) Regulations.
- The country’s food regulatory body notified the amendment on December 29, more than a year after it issued a draft on the subject for consultation with stakeholders.
- The revised regulation applies to edible refined oils, vanaspati (partially hydrogenated oils), margarine, bakery shortenings, and other mediums of cooking such as vegetable fat spreads and mixed fat spreads.
- It was in 2011 that India first passed a regulation that set a TFA limit of 10% in oils and fats, which was further reduced to 5% in 2015.
What are Trans Fats?

- Artificial Trans fats are created in an industrial process that adds hydrogen to liquid vegetable oils to make them more solid.
- Since they are easy to use, inexpensive to produce and last a long time, and give foods a desirable taste and texture, they are still widely used despite their harmful effects being well-known.
Why such a regulation?
- Trans fats are associated with increased risk of heart attacks and death from coronary heart disease.
- As per the WHO, approximately 5.4 lakh deaths take place each year globally because of intake of industrially-produced trans-fatty acids.
- The WHO has also called for global elimination of trans fats by 2023.
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Note4Students
From UPSC perspective, the following things are important :
Prelims level: Various parameters of the index
Mains level: Digital banking in India
The RBI has constructed a composite Digital Payments Index (DPI) with March 2018 as the base period to capture the extent of digitization of payments across the country.
Note various indicators of the DPI.
Digital Payments Index
- RBI-DPI will be published on the central bank’s website on a semi-annual basis from March 2021 onwards with a lag of four months.
- It comprises five broad parameters that enable the measurement of deepening and penetration of digital payments in the country over different time periods.
- The parameters are:
- Payment enablers (weight 25 percent)
- Payment infrastructure–demand-side factors (10 percent)
- Payment infrastructure – supply-side factors (15 percent)
- Payment performance (45 percent) and
- Consumer centricity (5 percent)
- Each of these parameters has sub-parameters which, in turn, consist of various measurable indicators, RBI said.
Why need such an Index?
- Digital payments in India have been growing rapidly.
- The DPI reflects accurately the penetration and deepening of various digital payment modes.
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Note4Students
From UPSC perspective, the following things are important :
Prelims level: IUC
Mains level: TRAI and its regulations of telecom services
The termination charge for wireless to wireless domestic calls has been zeroed from January 1 onwards. Until now operators paid Interconnection Usage Charges (IUC) of 6 paise per minute on mobile calls.
We are heading for 5G and yet we were indulged in 2G era spat. Sounds strange, but finally IUC got away….
Interconnection Usage Charge (IUC)
- IUC is the cost that a mobile operator pays to another operator for carrying through/ terminating a call.
- If a customer of Mobile Operator A calls a customer of Mobile Operator B and the call is completed, then A pays an IUC charge to B for carrying/facilitating the call.
- Essentially, it is the originating network compensating the receiving network for the cost of carrying the call. In India, IUC is set by the TRAI.
When was it introduced?
- IUC was introduced at a time when some operators had a larger network footprint compared to new players.
- In such a scenario, the larger operators had to be compensated for the investments it had to enable call completion. However, over the years this gap between operators has reduced.
- All the remaining operators have identical network footprint when it comes to voice calls.
- TRAI’s original deadline to phase out IUC was January 1, 2020.
What does it mean to Consumers?
- For mobile users, this means that all voice calls will be free from now on.
- While almost all operators had already started offering unlimited calls as part of their bundled pack, some were charging the 6 paise from consumers for paying IUC charges.
- From January 1, operators will stop collecting the charges.
- But other than that there will not be any significant gain for users. Tariff packs available in the market already offer data with unlimited voice calls.
What does the end of the IUC regime imply?
- For the operators, the end of the IUC regime will lead to easier operations.
- Many legal battles have been fought in the past over disputes related to IUC charges.
- Now, the operators can keep whatever money they collect from consumers without having to keep a tab on where the call is terminating.
- The change in the billing system will not have any significant impact on operators’ revenue.
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Note4Students
From UPSC perspective, the following things are important :
Prelims level: Operation Meghdoot
Mains level: Not Much

Colonel Narinder ‘Bull’ Kumar (Retd.), instrumental in the Army launching Operation Meghdoot and securing the dominating heights of Siachen Glacier in 1984 has passed away at 87.
Operation Meghdoot
- Operation Meghdoot was the codename for the Indian Armed Forces’ operation to seize control of the Siachen Glacier in Kashmir, precipitating the Siachen conflict.
- The Siachen then had become a bone of contention following a vague demarcation of territories in the Karachi Agreement of July 1949.
- Executed in the morning of 13 April 1984, this military operation, launched on the highest battlefield in the world, was the first offensive of its kind.
- The operation preempted Pakistan’s impending Operation Ababeel and was a success, resulting in Indian forces gaining control of the Siachen Glacier in its entirety.
- Currently, the Indian Army remains the first and only army in the world to have taken tanks and other heavy ordnance up to such an altitude (well over 5,000 m or 16,000 ft).
Bull Kumar’s contributions
- Kumar, a legendary mountaineer who had spotted Pakistani activities around the Siachen glacier in 1984 that helped India secure it subsequently.
- He was awarded Padma Shri, the fourth highest civilian award, in 1965.
- He was decorated with Param Vishisht Seva Medal (PVSM), Kirti Chakra, and Ati Vishisht Seva Medal (AVSM).
- The battalion headquarters on the glacier located close to an altitude of 16,000 feet is named “Kumar post” in his honor.
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Note4Students
From UPSC perspective, the following things are important :
Prelims level: Digital Ocean platform
Mains level: India's deep ocean mission
The Ministry of Earth Sciences has inaugurated the web-based application “Digital Ocean” developed by INCOIS.
Digital Ocean
- Digital Ocean is a first of its kind digital platform for Ocean Data Management.
- The platform will be promoted as a platform for capacity building on Ocean Data Management for all Indian Ocean Rim countries.
- It would help share ocean knowledge about the ocean with a wide range of users including research institutions, operational agencies, strategic users, the academic community, and the maritime industry and policymakers.
- It also provides free access to information to the general public and the common man.
- It will play a central role in the sustainable management of our oceans and expanding ‘Blue Economy’ initiatives.
Its’ features
- It includes a set of applications developed to organize and present heterogeneous oceanographic data by adopting rapid advancements in geospatial technology.
- It facilitates:
- Online interactive web-based environment for data integration,
- 3D and 4D (3D in space with time animation) data visualization,
- Data analysis to assess the evolution of oceanographic features,
- Data fusion and multi-format download of disparate data from multiple sources viz., in-situ, remote sensing, and model data, all of which is rendered on a georeferenced 3D Ocean.
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Note4Students
From UPSC perspective, the following things are important :
Prelims level: Indian architecture
Mains level: Indian architecture and foreign influence

A controversy has been playing out over the last several days over a decision by the IIM Ahmedabad to bring down 18 dormitories built by legendary American architect Louis Kahn on the old campus.
This newscard is full of facts. But one must note the features of present-day Indian Architecture and the western influence on it.
Kahn, in fact, is one among several foreign architects whose work defines several Indian cities. Take a glimpse of all important architects and their works:
Antonin Raymond & George Nakashima
- Golconde, one of India’s first modernist buildings, was conceptualized in Puducherry by the founders of the experimental township of Auroville.
- Tokyo-based Czech architect Antonin Raymond was invited to design this space as a universal commune, and Japanese-American woodworker George Nakashima would complete it after Raymond left India.
- It is possibly India’s first reinforced concrete buildings, built between 1937 and 1945.
- Its façade creates the impression that one could open or shut these concrete blinds, without compromising on privacy, while the ascetic interiors helped provide a meditative atmosphere.
Otto Koenigsberger
- Berlin-bred Koenigsberger was already working for the Maharaja of Mysore in the late 1930s when he was commissioned by Tata & Sons to develop the industrial township of Jamshedpur in the early 1940s.
- He would later design the masterplan for Bhubhaneswar (1948) and Faridabad (1949).
- Having seen children and women walk large distances to reach schools and workplaces, he planned for schools and bazaars in the city center and for a network of neighborhoods.
- His friends Albert Mayer and Mathew Nowicki would go on to design Chandigarh.
- However, much before Koenigsberger, there was the Scottish biologist and geographer Patrick Geddes, who wrote town planning reports, from 1915 to 1919, for 18 Indian cities, including Bombay and Indore.
Frank Lloyd Wright
- Though the legendary American architect never built a structure in India, his influence was unmistakable.
- Two of his students, Gautam and Gira Sarabhai, founders of the National Institute of Design, Ahmedabad, requested him to design the administration building for Sarabhai Calico Mills in 1946.
- It would possibly have been the city’s first high-rise with terraces and a podium.
- Padma Vibhushan Charles Correa, one of India’s finest architects and urban planners, was hugely influenced by Wright.
Le Corbusier
- Before Swiss-French painter-writer-architect Corbusier came on the scene in Chandigarh, there was Polish architect Mathew Nowicki, an admirer of Frank Lloyd Wright and American developer Albert Mayer.
- Nowicki’s death in a plane crash ended the commission, and Corbusier came on board.
- With English architect Maxwell Fry and his wife Jane Drew, Corbusier with his cousin Pierre Jeanneret would design many of Chandigarh’s civic buildings, from courts to housing.
- Corbusier’s modernist approach, without decoration, gave India its brutalist, bare concrete buildings.
- He won favour with the Sarabhai’s of Ahmedabad and built the Sarabhai House, Shodhan House, Mill Owner’s Association Building and Sankar Kendra. He is often called the “father of modern Indian architecture”.
Joseph Allen Stein
- He was invited by Vijayalakshmi Pandit in 1952 to come to India and establish the Department of Architecture and Planning at the West Bengal Engineering College.
- Though he also practiced briefly in Orissa and West Bengal, it’s in New Delhi where Stein left the deepest imprint.
- From the Triveni Kala Sangam, the High Commissioner’s Residence and Chancery for Australia, where his polygon-shaped masonry with local stone made its first appearance to ‘Steinabad’.
Louis Kahn
- The importance of being Kahn is never more real than now, as the American architect’s only project in India faces bulldozers.
- The design for IIM Ahmedabad (1962-1974) carried the essence of learning in the humility of its material, and the way spaces were managed.
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Note4Students
From UPSC perspective, the following things are important :
Prelims level: Blue Flag Beaches
Mains level: Coastal conservation

The Environment Minister has virtually hoisted the international blue flags in 8 beaches across the country.
Try this PYQ:
Q. At one of the places in India, if you stand on the seashore and watch the sea, you will find that the seawater recedes from the shoreline a few kilometers and comes back to the shore, twice a day, and you can actually walk on the seafloor when the water recedes. This unique phenomenon is seen at:
(a) Bhavnagar
(b) Bheemunipatnam
(c) Chandipur
(d) Nagapattinam
About Blue Flag Certification
- This Certification is accorded by an international agency “Foundation for Environment Education, Denmark” based on 33 stringent criteria in four major heads i.e.
- Environmental Education and Information,
- Bathing Water Quality,
- Environment Management and Conservation and
- Safety and Services on the beaches.
- It started in France in 1985 and has been implemented in Europe since 1987, and in areas outside Europe since 2001 when South Africa joined.
- Japan and South Korea are the only countries in South and southeastern Asia to have Blue Flag beaches.
- Spain tops the list with 566 such beaches; Greece and France follow with 515 and 395, respectively.
Which are the 8 beaches?
The beaches where the International Blue Flags were hoisted are:
- Kappad (Kerala)
- Shivrajpur (Gujarat)
- Ghoghla (Diu)
- Kasarkod and
- Padubidri (Karnataka)
- Rushikonda (Andhra Pradesh)
- Golden (Odisha) and
- Radhanagar (Andaman & Nicobar Islands)
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