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Subject: Environment

  • Pusa Bio-Decomposer

    Delhi CM has said that the “Pusa bio-decomposer” is a success in Delhi and he will inform the Supreme Court that it is an effective way to prevent stubble burning.

    Pusa Bio-decomposer provides a unique alternative against the stubble burning practices.

    Pusa Bio-decomposer

    • It is a solution developed by the scientists at the Indian Agricultural Research Institute, Pusa, which can turn crop residue into manure in 15 to 20 days and therefore, can prevent stubble burning.
    • It involves making a liquid formulation using Pusa decomposer capsules and readily available inputs, fermenting it over 8-10 days, and then spraying the mixture on fields.
    • It is a mix of seven fungi that produce enzymes to digest cellulose, lignin and pectin in paddy straw.
    • The fungi thrive at 30-32 degree Celsius, which is the temperature prevailing when paddy is harvested and wheat is sown.

    Back2Basics: Decomposition

    • Decomposition refers to a biological process of breaking down organic material into smaller constituent parts.
    • The decomposition of organic substances is ecologically significant. It plays a part in the nutrient cycle. It is an essential process of recycling matter in the biosphere.
    • A decomposer is an organism whose ecological function involves the recycling of nutrients by performing the natural process of decomposition as it feeds on decaying organisms.
    • Examples of decomposers are fungi and bacteria that obtain their nutrients from a dead plant or animal material.
    • They break down cells of dead plants and animals into simpler substances, which become organic nutrients available to the ecosystem.

  • Char-chaporis of Assam

    A proposed museum reflecting the “culture and heritage of the people living in char-chaporis” has stirred up a controversy in Assam.

    Do you know?

    Phumdis are a series of floating islands, exclusive to the Loktak Lake in Manipur. They cover a substantial part of the lake area and are heterogeneous masses of vegetation, soil and organic matter, in different stages of decay.

    What are char-chaporis?

    • A char is a floating island while chaporis are low-lying flood-prone riverbanks.
    • They are used interchangeably as they keep changing shapes — a char can become a chapori, or vice versa, depending on the push and pull of the Brahmaputra.
    • Prone to floods and erosion, these areas are marked by low development indices.
    • While Bengali-origin Muslims primarily occupy these islands, other communities such as Misings, Deoris, Kocharis, Nepalis also live here.
    • In the popular imagination, however, chars have become synonymous to the Bengali-speaking Muslims of dubious nationality.

    Who are the Miyas?

    • The ‘Miya’ community comprises descendants of Muslim migrants from East Bengal (now Bangladesh) to Assam.
    • They came to be referred to as ‘Miyas’, often in a derogatory manner.
    • The community migrated in several waves — starting with the British annexation of Assam in 1826, and continuing into Partition and the 1971 Bangladesh Liberation War.

  • WWF Water Risk Filter

    Nearly a third of the 100 cities in the world susceptible to ‘water risk’ — defined as losses from battling droughts to flooding — are in India, according to the WWF Water Risk Filter.

    Try this question for mains:

    Q.For Indian cities to break away from the vicious loop of flooding and water scarcity, nature-based solutions like restoration of urban watersheds and wetlands could offer an alternative. Examine.

    What is Water Risk Filter?

    • This is an online tool, co-developed by the Worldwide Fund for Nature that helps evaluate the severity of risk places faced by graphically illustrating various factors that can contribute to water risk.
    • Launched in 2012, it is a practical online tool that helps companies and investors assess and respond to water-related risks facing their operations and investments across the globe.
    • After a major upgrade in 2018, the Water Risk Filter 5.0 enables companies and investors to Explore, Assess, Value and Respond to water risks.
    • Lately, the Water Risk Filter provides scenarios of water risks for 2030 and 2050, integrating climate and socio-economic changes in different pathways.

    Highlights of the recent analysis

    • It reported 30 Indian cities that would face a ‘grave water risk’ by 2050 due to a dramatic increase in their population percentage to 51 per cent by 2050, from 17 per cent in 2020.
    • Jaipur topped the list, followed by Indore and Thane. Mumbai, Kolkata and Delhi also featured on the list.
    • The global list includes cities such as Beijing, Jakarta, Johannesburg, Istanbul, Hong Kong, Mecca and Rio de Janeiro. China accounts for almost half the cities.

    Major recommendations

    • The future of India’s environment lies in its cities. As India rapidly urbanizes, cities will be at the forefront both for India’s growth and for sustainability.
    • For cities to break away from the current vicious loop of flooding and water scarcity, nature-based solutions like restoration of urban watersheds and wetlands could offer solutions.
    • Urban watersheds and wetlands are critical for maintaining the water balance of a city, flood cushioning, micro-climate regulation and protecting its biodiversity, the report notes.

  • [pib] Mansar Lake

    Mansar Lake Development Plan is getting fulfilled after a long wait of 70 years.

    Try this PYQ:

    Q.With reference to a conservation organization called Wetlands International, which of the following statements is/are correct?

    1. It is an intergovernmental organization formed by the countries which are signatories to Ramsar Convention.
    2. It works at the field level to develop and mobilize knowledge, and use the practical experience to advocate for better policies.

    Select the correct answer using the code given below:

    (a) 1 only

    (b) 2 only

    (c) Both 1 and 2

    (d) Neither 1 nor 2

    About Mansar Lake

    • Situated at about 37 km from Jammu, Mansar is a lake fringed by forest-covered hills, over a mile in length by half-a-mile in width.
    • Surinsar-Mansar Lakes are designated as Ramsar Convention in November 2005.
    • With all religions belief and heritage behind the Mansar Lake is also picking up its fame among the tourists with all its flora & fauna.
    • The lake has cemented path all around with required illumination, with projected view decks to enjoy flickering of seasonal birds, tortoise and fishes of different species.
    • There is a wildlife Sanctuary housing jungle life like Spotted Deer, Nilgai etc. besides other water birds such as Cranes, Ducks etc.

    Back2Basics: Ramsar Convention

    • The Convention on Wetlands of International Importance (better known as the Ramsar Convention) is an international agreement promoting the conservation and wise use of wetlands.
    • It is the only global treaty to focus on a single ecosystem.
    • The convention was adopted in the Iranian city of Ramsar in 1971 and came into force in 1975.
    • Traditionally viewed as a wasteland or breeding ground of disease, wetlands actually provide freshwater and food and serve as nature’s shock absorber.
    • Wetlands, critical for biodiversity, are disappearing rapidly, with recent estimates showing that 64% or more of the world’s wetlands have vanished since 1900.
    • Major changes in land use for agriculture and grazing, water diversion for dams and canals and infrastructure development are considered to be some of the main causes of loss and degradation of wetlands.

  • Need for Sponge cities Mission in India

    Issue of flood in the cities

    • Over 50 peple died in the wake of torrential rains in the third week of October in Hyderabad.
    • This experience is not unique to the city of Hyderabad, five years ago Chennai saw a massive flood costing much damage and lives.
    • Gurugram over the past few years comes to a complete standstill during the monsoon months.
    • And for Mumbai, the monsoon has become synonymous with flooding and enormous damages.

    Causes of frequent urban floods:

    Natural:

    • Meteorological Factors: Heavy rainfall, cyclonic storms and thunderstorms causes water to flow quickly through paved urban areas and impound in low lying areas.
    • Hydrological Factors: Overbank flow channel networks, occurrence of high tides impeding the drainage in coastal cities.
    • Climate Change: Climate change due to various anthropogenic events has led to extreme weather events.

    Anthropological:

    • Unplanned Urbanization: Unplanned Urbanization is the key cause of urban flooding. A major concern is blocking of natural drainage pathways through construction activity and encroachment on catchment areas, riverbeds and lakebeds.
    • Destruction of lakes: A major issue in India cities. Lakes can store the excess water and regulate the flow of water. However, pollution of natural urban water bodies and converting them for development purposes has increased risk of floods.
    • Unauthorised colonies and excess construction: Reduced infiltration due paving of surfaces which decreases ground absorption and increases the speed and amount of surface flow
    • Poor Solid Waste Management System: Improper waste management system and clogging of storm-water drains because of silting, accumulation of non-biodegradable wastes and construction debris.
    • Drainage System: Old and ill maintained drainage system is another factor making cities in India vulnerable to flooding.
    • Irresponsible steps: Lack of attention to natural hydrological system and lack of flood control measures.

    Impact of the devastation due to floods:

    • On economy: Damage to infrastructure, roads and settlements, industrial production, basic supplies, post disaster rehabilitation difficulties etc.
    • On human population and wildlife: Trauma, loss of life, injuries and disease outbreak, contamination of water etc.
    • On environment: Loss of habitat, tree and forest cover, biodiversity loss and large scale greenery recovery failure.
    • On transport and communication: Increased traffic congestion, disruption in rail services, disruption in communication- on telephone, internet cables causing massive public inconvenience.

    What is to be done

    1) Management of wetlands

    • We neglect the issues of incremental land use change, particularly of those commons which provide us with necessary ecological support — wetlands.
    •  We need to start paying attention to the management of our wetlands by involving local communities.
    • The risk is going to increase year after year with changing rainfall patterns and a problem of urban terrain which is incapable of absorbing, holding and discharging water.

    2) Implementing the idea of sponge cities

    • The idea of a sponge city is to make cities more permeable so as to hold and use the water which falls upon it.
    • Sponge cities absorb the rain water, which is then naturally filtered by the soil and allowed to reach urban aquifers.
    • This allows for the extraction of water from the ground through urban or peri-urban wells.
    • This water can be treated easily and used for city water supply.
    • In built form, this implies contiguous open green spaces, interconnected waterways, and channels and ponds across neighbourhoods that can naturally detain and filter water.
    • It implies support for urban ecosystems, bio-diversity and newer cultural and recreational opportunities,
    • These can all be delivered effectively through an urban mission along the lines of the Atal Mission for Rejuvenation and Urban Transformation (AMRUT), National Heritage City Development and Augmentation Yojana (HRIDAY) and Smart Cities Mission.

    On a top priority, such a mission should address the following.

    • 1) Wetland policy: In most of our lakes, the shallow ends, which often lie beyond the full tank level, have disappeared.
    • These shallow ends are best characterised as wetlands.
    • Regardless of ownership, land use on even this small scale needs to be regulated by development control.
    • 2) Watershed management and emergency drainage plan is next.
    • This should be clearly enunciated in policy and law.
    • 3) Ban against terrain alteration is third.
    • Lasting irreversible damage has been done to the city by builders, property owners, and public agencies by flattening terrain and altering drainage routes.
    • 4) Use of porus material: Our cities are becoming increasingly impervious to water, not just because of increasing built up but also because of the nature of materials used.
    • To improve the city’s capacity to absorb water, new porous materials and technologies must be encouraged or mandated across scales.
    • Examples of these technologies are bioswales and retention systems, permeable material for roads and pavement, drainage systems which allow storm water to trickle into the ground, green roofs and harvesting systems in buildings.

    Conclusion

    We can learn to live with nature, we can regulate human conduct through the state and we can strategically design where we build. We need to urgently rebuild our cities such that they have the sponginess to absorb and release water without causing so much misery and so much damage to the most vulnerable of our citizens, as we have seen.

  • What are Western Disturbances?

    With the approaching winter, minimum temperatures in the national capital have trended downward over the last due to the arrival of northwesterly winds called Western Disturbances.

    Try this PYQ:

    Q.Westerlies in the southern hemisphere is stronger and persistent than in northern hemisphere. Why?

    1. The southern hemisphere has less landmass as compared to the northern hemisphere.
    2. Coriolis force is higher in the southern hemisphere as compared to the northern hemisphere

    Which of the statements given above is/are correct?

    (a) Only 1

    (b) Only 2

    (c) Both 1 and 2

    (d) Neither 1 nor 2

    Western Disturbances

    • A western disturbance is an extratropical storm originating in the Mediterranean region that brings sudden winter rain to the northwestern parts of the Indian subcontinent.
    • It is a non-monsoonal precipitation pattern driven by the westerlies.
    • The moisture in these storms usually originates over the Mediterranean Sea, the Caspian Sea and the Black Sea.
    • Extratropical storms are global phenomena with moisture usually carried in the upper atmosphere, unlike their tropical counterparts where the moisture is carried in the lower atmosphere.
    • In the case of the Indian subcontinent, moisture is sometimes shed as rain when the storm system encounters the Himalayas.
    • Western disturbances are more frequent and strong in the winter season.

    Their significance

    • Western disturbances, specifically the ones in winter, bring moderate to heavy rain in low-lying areas and heavy snow to mountainous areas of the Indian Subcontinent.
    • They are the cause of most winter and pre-monsoon season rainfall across northwest India.
    • Precipitation during the winter season has great importance in agriculture, particularly for the rabi crops.
    • Wheat among them is one of the most important crops, which helps to meet India’s food security. An average of four to five western disturbances forms during the winter season.
    • The rainfall distribution and amount vary with every western disturbance.

    Also read: Polar Vortex 

  • Commission for Air Quality Management in NCR

    The President of India has signed the Commission for Air Quality Management in National Capital Region and Adjoining Areas Ordinance, 2020.

    Try this question from CS Mains 2015:

    Q.Mumbai, Delhi and Kolkata are the three megacities of the country but the air pollution is a much more serious problem in Delhi as compared to the other two. Why is this so?

    About the Ordinance

    • The Ordinance seeks to create an overarching body to consolidate all monitoring bodies and to bring them on one platform so air quality management can be carried out in a more comprehensive, efficient, and time-bound manner.
    • It came within days of the hearing in ‘Aditya Dubey vs Union of India’ in the court of the CJI, where Solicitor General had indicated the setting up of such a Commission.

    Why has the central government set up this Commission?

    • The monitoring and management of air quality in the Delhi NCR region have been done piecemeal by multiple bodies including the Central Pollution Control Board (CPCB) and the adjacent state PCBs and state governments.
    • They, in turn, are monitored by the Environment Ministry, and the Supreme Court itself, which monitors air pollution as per the judgment in ‘M C Mehta vs Union of India’, 1988.

    Consolidating the efforts

    • The Centre seeks to relieve the Supreme Court from having to constantly monitor pollution levels through various pollution-related cases.
    • The body indicates the central government’s push to bring all stakeholders on one platform.
    • This is important because the management of air pollution in Delhi NCR will involve controlling stubble-burning (Agriculture Ministry and state governments), and the control of industrial emissions (Commerce and Industries Ministry), etc.

    About the Commission

    • The Commission, which will be a permanent body, will have over 20 members and will be chaired by a retired official of the level of Secretary to the GoI or Chief Secretary of a state.
    • It will include a representative of the Secretary of the MoEFCC, five Secretary level officers who will be ex officio members and two joint secretary-level officers who will be full-time members.
    • The Commission will also have representation from the CPCB, ISRO, air pollution experts, and three representatives of non-government organisations (NGOs).
    • As associate members, the Commission will have representatives from various other Ministries including the Ministries of Agriculture, Petroleum, Power, Transport, Housing etc.

    Power and functions

    • In matters of air pollution and air quality management, the Commission will supersede all existing bodies.
    • It will have the powers to issue directions to the states.
    • The Commission will also coordinate efforts of state governments to curb air pollution, and will lay down the parameters of air quality for the region.
    • It will have powers to restrict the setting up of industries in vulnerable areas and will be able to conduct site inspections of industrial units.

    Penal powers

    • The Commission will have some penal powers.
    • If its directions are contravened, through say, the setting up of an industrial unit in a restricted area, the Commission will have the power to impose a fine of up to Rs 1 crore and imprisonment of up to 5 years.

    Wasn’t EPCA effective?

    • The one body with powers similar to the new Commission’s was the Environment Pollution (Prevention and Control) Authority (EPCA).
    • It was not a statutory body but drew legitimacy from the Supreme Court, which has been looking at cases of air pollution as part of the judgment in M C Mehta vs Union of India (1988).
    • The EPCA was not, however, supported by a legal framework in the form of a law. It did have the authority to issue fines or directions and guidelines to the governments in other states.

    How is the new commission expected to alter the situation?

    • By forming a new commission, the government has taken the issue of air pollution out of the purview of the judiciary.
    • As per the Ordinance, only NGT, and not civil courts, is authorised to hear cases where the commission is involved.
    • The central government has got itself out of the clutch of Supreme Court and closed down SC-appointed EPCA.

    Challenges ahead

    • The Commission has a large number of members from the central government, which has not gone down well with the states.
    • It is full of officials from the central government. Taking away any say from the state government is not the way to go further.
    • Also, political differences will also now play a part in the functioning of the Commission because states are not happy with the overarching powers being vested in it.

  • In news: Great Barrier Reef

    Australian scientists have found a detached coral reef on the Great Barrier Reef that exceeds the height of the Empire State Building and the Eiffel Tower.

    Try this PYQ:

    Q.Consider the following statements:

    1. Most of the world’s coral reefs are in tropical waters.
    2. More than one-third of the world’s coral reefs are located in the territories of Australia, Indonesia and the Philippines.
    3. Coral reefs host far more number of animal phyla than those hosted by tropical rainforests.

    Which of the above statements is/are correct?

    (a) 1 and 2 only

    (b) 3 only

    (c) 1 and 3 only

    (d) 1 and 3 only

    About Great Barrier Reef

    • The Great Barrier Reef is the world’s largest coral reef system composed of over 2,900 individual reefs and 900 islands.
    • It is stretched for over 2,300 kilometres over an area of approximately 344,400 square kilometres.
    • The reef is located in the Coral Sea, off the coast of Queensland, Australia.
    • It was world heritage listed in 1981 by UNESCO as the most extensive and spectacular coral reef ecosystem on the planet.

    Why it is significant?

    • This is first such discovery in over 100 years.
    • The “blade-like” reef is nearly 500 metres tall and 1.5 kilometres wide.
    • It lies 40 metres below the ocean surface and about six kilometres from the edge of the Great Barrier Reef.

    Tap to read more about:

  • What is Atlantification?

    Scientists have uncovered “hotspots” where some parts of the Barents Sea are starting to more closely resemble the Atlantic. They call this phenomenon “Atlantification”.

    Try this MCQ:

    Q.The Atlantification phenomenon sometimes seen in news is most closely related to which of the following seas/water bodies?

    a) Norwegian Sea

    b) Kara Sea

    c) Barents Sea

    d) Baffin Bay

    What is Atlantification?

    • Streams of warmer water from the Atlantic Ocean flow into the Arctic at the Barents Sea.
    • This warmer, saltier Atlantic water is usually fairly deep under the more buoyant Arctic water at the surface.
    • Lately, however, the Atlantic water has been creeping up. That heat in the Atlantic water is helping to keep ice from forming and melting existing sea ice from below.
    • This process is called “Atlantification”.
    • The ice is now getting hit both from the top by a warming atmosphere and at the bottom by a warming ocean.

    Reasons for it

    • In the background of all of this is global climate change.
    • The Arctic sea ice extent and thickness have been dropping for decades as global temperatures rise.
    • As the Arctic loses ice and the ocean absorbs more solar radiation, global warming is amplified.
    • That affects ocean circulation, weather patterns and Arctic ecosystems spanning the food chain, from phytoplankton all the way to top predators.

  • Species in news: Echinops Sahyadricus

    Researchers have discovered a new species of Echinops Sahyadricus (Sahyadri Globe Thistle) from the Rajgad Fort in the Sahyadri Mountains.

    Echinops Sahyadricus

    • Echinops is a genus of about 130 species of flowering plants found in tropical and North Africa, the Mediterranean basin and West Asia, extending eastwards to China and Japan.
    • The highest number of taxa (76) is concentrated in the Iranian plateau. Five species are found in India including two in Maharashtra.
    • The new species is unique because of the size of its composite inflorescence which measures up to 9 cm in diameter that is relatively large compared to other Echinops species found around the world.
    • It grows vegetative on open grassy slopes of mountains in four months of monsoon and blooms in November. Fruiting can be seen in December.