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Subject: Environment

  • Gorumara National Park

    A bison (Indian Gaur) was allegedly poached in Gorumara National Park.

    Try this PYQ:

    Which one of the following National Parks lies completely in the temperate alpine zone?(CSP 2019)

    (a) Manas National Park

    (b) Namdapha National Park

    (c) Neora Valley National Park

    (d) Valley of Flowers National Park

    Gorumara NP

    • It is located in the Eastern Himalayas’ submontane Terai belt.
    • This region has rolling forests and riverine grasslands, and is known as the Dooars in West Bengal.
    • The park is located on the flood plains of the Murti River and Raidak River. The major river of the park is the Jaldhaka river, a tributary of the Brahmaputra river system.
    • In this regard, Gorumara is a significant watershed area between the Ganges and Brahmaputra river systems.
    • The park is rich in large herbivores including Indian rhinoceros, gaur, Asian elephant, sloth bear, chital, and sambar deer. Small herbivores include barking deer, hog deer and wild boar.

    About Gaur

    • The Gaur called the Indian bison, is native to South and Southeast Asia and has been listed as Vulnerable on the IUCN Red List since 1986.
    • It is the largest species among the wild cattle.
    • The domesticated form of the gaur is called gayal (Bos frontalis) or mithun.

  • Micro-plastic Pollution in Atlantic Ocean

    The Atlantic Ocean contains 12-21 million tonnes of microplastics — about 10 times higher than previously determined — according to new research published in Nature Communications.

    Highlights of the report

    • In the study, scientists studied pollution of the Atlantic Ocean caused by three types of plastics: polyethylene, polypropylene, and polystyrene, which were suspended in the top 200 metres of the ocean.
    • These three types of plastic are most commonly used for packaging.
    • Scientists say that pollution caused by microplastics has been “severely” underestimated in previous assessments.
    • They also estimate that based on plastic waste generation trends from 1950-2015 and considering that the Atlantic Ocean has received 0.3-0.8 per cent of the global plastic waste for 65 years.
    • To date, a key uncertainty has been the magnitude of contamination of the ocean and our findings demonstrate that this is much higher in terms of mass than has been estimated previously.

    Try this PYQ:

    Q. Why is there a great concern about the ‘microbeads’ that are released into the environment? (CSP 2019)

    (a) They are considered harmful to marine ecosystems.

    (b) They are considered to cause skin cancer in children.

    (c) They are small enough to be absorbed by crop plants in irrigated fields.

    (d) They are often found to be used as food adulterants.

    What are Microplastics?

    • Microplastics are plastic debris smaller than 5mm in length, or about the size of a sesame seed.
    • While they come from a variety of sources, one of them is when larger pieces of plastic degrade into smaller pieces, which are difficult to detect.

    How does plastic reach the oceans?

    • There are multiple pathways for them to reach the oceans.
    • For instance, riverine and atmospheric transport from coastal and inland areas, illegal dumping activities and direct-at-sea littering from shipping, fishing and aquaculture activities, scientists have said.
    • According to the IUCN, at least 8 million tonnes of plastic end up in the oceans every year and makes up about 80 per cent of all marine debris from surface waters to deep-sea sediments.

    Why is plastic pollution especially harmful?

    • Plastic can take hundreds to thousands of years to decompose depending on the type of plastic and where it has been dumped.
    • Some marine species such as zooplanktons show preferential ingestion of smaller particles, making them easier to enter the food chain and their conversion to fast-sinking faecal pellets.
    • Over the past few years, various news reports have shown that marine animals such as whales, seabirds and turtles unknowingly ingest plastic and often suffocate to death.
    • While all sorts of marine species are prone to get impacted by plastic pollution, typically, bigger marine species tend to get more attention because of the amounts of debris they can hold up.

    Impact on humans

    • For humans, too, marine plastic pollution is harmful if it reaches the food chain. For instance, microplastics have been found in tap water, beer and even salt.
    • One of the first studies to estimate plastic pollution in human ingestion that was published in June 2019 said that an average person eats at least 50,000 particles of microplastic each year.
    • Consumption of plastic by humans is harmful since several chemicals that are used to produce plastics can be carcinogenic.
    • Even so, since microplastics are an emerging field of study, its exact risks on the environment and human health are not clearly known.

  • PM CARES Fund is a “public charitable trust”: SC

    The Supreme Court has endorsed the PM CARES Fund as a “public charitable trust” to which donors contribute voluntarily.

    Try this question:

    Q. The creation of PM CARES fund is violative of the provision of the Disaster Management Act, 2005. Analyse.

    What is the case?

    • The petition had argued that the PM-CARES Fund was not subject to CAG audit.
    • It was not under “public scrutiny”. Contributions to it were “100% tax-free”.
    • It was accused that there was statutory fund already in existence under the Disaster Management Act of 2005 to receive contributions to finance the fight against a calamity.

    About PM CARES Fund

    • The Prime Minister’s Citizen Assistance and Relief in Emergency Situations Fund (PM CARES Fund) were created on 28 March 2020 following the COVID-19 pandemic in India.
    • The fund will be used for combat, containment and relief efforts against the coronavirus outbreak and similar pandemic like situations in the future.
    • The PM is the chairman of the trust. Members will include the defence, home and finance ministers.
    • The fund will also enable micro-donations. The minimum donation accepted for the PM CARES Fund is ₹10 (14¢ US).
    • The donations will be tax-exempt and fall under corporate social responsibility.

    What did the Court rule?

    • There is “no occasion” for the Comptroller and Auditor General (CAG) to audit a public charitable trust independent of budgetary support or government money.
    • The court said that PM-CARES is “not open” for a PIL petitioner to question the “wisdom” that created the fund in an hour of need.
    • The court dismissed the idea that the PM CARES was constituted to “circumvent” the National Disaster Response Fund (NDRF).
    • The Bench also refused to direct the transfer of funds from the PM CARES Fund to the NDRF. It said they were two separate entities.

    Also read:

    PM-CARES Fund

  • Bioethanol Blending in Petrol

    The government has set targets of 10 per cent bioethanol blending of petrol by 2022 and to raise it to 20 per cent by 2030 to curb carbon emissions and reduce India’s dependence on imported crude oil.

    Try this PYQ:

    Q.Given below are the names of four energy crops. Which one of them can be cultivated for ethanol?(CSP 2010)

    (a) Jatropha

    (b) Maize

    (c) Pongamia

    (d) Sunflower

    What is Ethanol Blended Petrol (EBP) Program?

    • Ethanol Blended Petrol (EBP) programme was launched in January 2003 for the supply of 5% ethanol blended petrol.
    • The programme sought to promote the use of alternative and environment-friendly fuels and to reduce import dependency for energy requirements.
    • OMCs are advised to continue according to the priority of ethanol from 1) sugarcane juice/sugar/sugar syrup, 2) B-heavy molasses 3) C-heavy molasses and 4) damaged food grains/other sources.

    Bio-ethanol blend in India

    • 1G and 2G bioethanol plants are set to play a key role in making bio-ethanol available for blending but face challenges in attracting investments from the private sector.
    • 1G bioethanol plants utilise sugarcane juice and molasses, byproducts in the production of sugar, as raw material, while 2G plants utilise surplus biomass and agricultural waste to produce bioethanol.
    • Currently, domestic production of bioethanol is not sufficient to meet the demand for bio-ethanol for blending with petrol at Indian Oil Marketing Companies (OMCs).
    • Sugar mills, which are the key domestic suppliers of bio-ethanol to OMCs, were only able to supply 1.9 billion litres of bio-ethanol to OMCs equating to 57.6 per cent of the total demand of 3.3 billion litres.

    Hurdles in meeting the demand

    • Lack of infrastructure: Many sugar mills are best placed to produce bioethanol do not have the financial stability to invest in biofuel plants. There are also concerns among investors on the uncertainty over the price of bio-ethanol in the future.
    • Lack of raw materials: Presently there is no mechanism for depots where farmers could drop their agricultural waste. The central government should fix a price for agricultural waste to make investments in 2G bioethanol production an attractive proposition.
    • Rigid pricing mechanism: Sugars mills have to pay high prices for sugarcane set by the government even when there have been supplying gluts. The prices of both sugarcane and bio-ethanol are set by the central government.

    Way ahead

    • The government should provide greater visibility on the price of bioethanol that sugar mills can expect by announcing a mechanism by which the price of bio-ethanol would be decided.
    • 2G bioethanol not only provided a clean source of energy but also help provide greater income to farmers and prevent them from having to burn agricultural waste which can be a major source of air pollution.

  • Tornado’s dynamics and its India connection

    Babu ChunderSikur Chatterjee’s paper was the earliest record of a tornado’s dynamics in the history of meteorology, according to a study.

    Try this PYQ:

    Q. In the South Atlantic and South-Eastern Pacific regions in tropical latitudes, cyclone does not originate. What is the reason? (CSP 2015)

    (a) Sea surface temperatures are low

    (b) Inter-Tropical Convergence Zone seldom occurs

    (c) Coriolis force is too weak

    (d) Absence of land in those regions

    What is a Tornado?

    • A tornado is a rapidly rotating column of air that is in contact with both the surface of the Earth and a cumulonimbus cloud or, in rare cases, the base of a cumulus cloud.
    • The windstorm is often referred to as a twister, whirlwind or cyclone winds blow counterclockwise in the Northern Hemisphere and clockwise in the Southern.
    • Tornadoes come in many shapes and sizes, and they are often visible in the form of a condensation funnel originating from the base of a cumulonimbus cloud, with a cloud of rotating debris and dust beneath it.
    • It is generally accompanied by extreme weather such as heavy downpours, hail storms, and lightning.

    Who was Babu ChunderSikur Chatterjee?

    • Chatterjee was an Indian scientist employed with the Surveyor General of India during the British colonial era.
    • He was likely the first person to scientifically document a tornado’s path in 1865, a study from the Indian Institute of Tropical Meteorology (IITM), Pune, has claimed.
    • Chatterjee had published his findings in a journal named Proceedings of the Asiatic Society of Bengal, in a paper titled ‘Note on a whirlwind at Pundooah’, near Hooghly.
    • The paper described a tornado’s dynamics in meticulous detail and was accompanied by a sketch that mathematically depicted its scale, track and rotation.

    His work

     

    • Chatterjee quantitatively mapped the entire trail of ĂĄ tornado’s destruction.
    • He benefited from the rare opportunity to observe a tornado passing through a railway track where there were conveniently placed markers at predefined locations.
    • This enabled him to observe and make clear measurements of the tornado’s direction, dynamics and path.

    Back2Basics

  • Bhadbhut Project

    The Gujarat government recently awarded the contract for a the Bhadbhut project in Bharuch, Gujarat. It has faced protests from local fishermen for its likely impact on fishing patterns, notably those of hilsa.

    Make a note of major dams in India along with the rivers, terrain, major wildlife sanctuaries and national parks incident to these rivers.

    What is the Bhadbhut Project?

    • It is planned to be a 1.7-km causeway-cum-weir barrage with 90 gates, across the river Narmada, 5 km from Bhadbhut village, and 25 km from the mouth of the river, where it flows into the Gulf of Khambhat.
    • The barrage will stop most of the excess water flowing out of the Sardar Sarovar Dam from reaching the sea and thus create a “sweet water lake” of 600 mcm (million cubic metres) on the river.
    • The barrage will also have a six-lane road that will connect the left and right banks of the river and provide shorten the land distance between two large industrial estates in Surat and Bharuch.
    • The project also aims to prevent flooding in years when rainfall is higher than normal.
    • Embankments 22 km long will be made and will extend upstream towards Bharuch, from either side of the river.
    • The project is part of the larger Kalpasar Project, which entails the construction of a 30-km dam across the Gulf of Khambhat between Bharuch and Bhavnagar districts.
    • The reservoir is meant to tap the waters of the Narmada, Mahisagar and Sabarmati.

    Why are fishermen upset?

    • The barrage is expected to interfere with the migration and breeding cycle of hilsa.
    • A marine fish, hilsa migrate upstream and arrives in the brackish water of the Narmada estuary near Bharuch for spawning usually during the monsoon months of July and August, and continue doing so till November.
    • Once the barrage is built, it is expected to block its natural entry.

    About Hilsa Fish

    IUCN status: Least Concerned

    • The Hilsa is a species of fish related to the herring, in the family Clupeidae.
    • It is a very popular and sought-after food fish in the Indian Subcontinent.
    • Though it’s a saltwater fish, it migrates to sweet waters.
    • It is the national fish of Bangladesh and state symbol in the Indian states of West Bengal and Tripura.
    • The fish contributes about 12% of the total fish production and about 1.15% of GDP in Bangladesh.

  • Death Valley records the highest temperature on Earth

    California’s Death Valley registered a temperature of 54.4 degrees Celsius or 129.9 degrees Fahrenheit on August 16, 2020, which, once verified, could be the hottest temperature ever recorded on Earth.

    Some years back, there was a question in the mains:

    Major hot deserts in the northern hemisphere are located between 20-30 degree north and on the western side of the continents. Why?

    Death Valley and its location

    • Death Valley is a desert valley in Eastern California, in the northern Mojave Desert, bordering the Great Basin Desert.
    • It is one of the hottest places on Earth, along with deserts in the Middle East and the Sahara.
    • The valley is extremely dry because it lies in the rain shadow of four major mountain ranges (including the Sierra Nevada and the Panamint Range).
    • Moisture moving inland from the Pacific Ocean must pass eastward over the mountains to reach Death Valley; as air masses are forced upward by each range, they cool and moisture condenses, to fall as rain or snow on the western slopes.
    • When the air masses reach Death Valley, most of the moisture has already been lost and there is little left to fall as precipitation.

    Key factors leading to its high temperature

    • Solar heating: The valley’s surface (consisting of soil, rocks, sand, etc.) undergoes intense solar heating because the air is clear and dry, and the land is dark and sparsely vegetated. This is especially noticeable in summer when the sun is nearly directly overhead.
    • Trapping of warm air: Warm air naturally rises and cools; in Death Valley, this air is subject to continual reheating as it is trapped by high, steep valley walls and recycled back to the valley floor.
    • Migration of warm air from other areas (advection): Warm desert regions adjacent to Death Valley, especially to the south and east, often heat air before it arrives in Death Valley.
    • Warm mountain winds: As winds are forced up and over mountains (e.g., the numerous ranges west of Death Valley), the winds can be warmed in several ways. The resulting dry, warm winds are known as foehn winds.

  • In news: Mauritius Oil Spill

    A Japanese ship recently struck a coral reef resulting in an oil spill of over 1,000 tonnes into the Indian Ocean near Mauritius.

    Try this PYQ:

    Q.Recently, “oil zapper’’ was in the news. What is it? (CSP 2011)

    (a) It is an eco-friendly technology for the remediation of oily sludge and oil spills.

    (b) It is the latest technology developed for undersea oil exploration.

    (c) It is a genetically engineered high biofuel-yielding maize variety.

    (d) It is the latest technology to control the accidentally caused flames from oil wells.

    What caused the Mauritius oil spill?

    • A Japanese vessel struck a coral reef resulting in an oil spill of over 1,000 tonnes into the Indian Ocean.
    • The ship was carrying an estimated 4,000 tonnes of oil.
    • The accident had taken place near two environmentally protected marine ecosystems and the Blue Bay Marine Park Reserve, which is a wetland of international importance.

    How dangerous are oil spills?

    • Oil spills affect marine life by exposing them to harsh elements and destroying their sources of food and habitat.
    • Further, both birds and mammals can die from hypothermia as a result of oil spills.
    • For instance, oil destroys the insulating ability of fur-bearing mammals, such as sea otters.
    • It also decreases the water repellency of birds’ feathers, without which they lose their ability to repel cold water.

    Some major incidents

    • Some of the world’s largest oil spills include the Persian Gulf War oil spill of 1991 when more than 380 million gallons of oil was poured into the northern Persian Gulf by Iraq’s forces.
    • The 2010 Deepwater Horizon oil spill in the Gulf of Mexico is also considered to be among the largest known accidental oil spills in history.
    • Starting April 20, 2010, over 4 million barrels of oil flowed over a period of 87 days into the Gulf of Mexico.

    How is the oil spill cleaned?

    • There are a few ways to clean up oil spills including skimming, in situ burning and by releasing chemical dispersants.
    • Skimming involves removing oil from the sea surface before it is able to reach the sensitive areas along the coastline.
    • In situ burning means burning a particular patch of oil after it has concentrated in one area.
    • Releasing chemical dispersants helps break down oil into smaller droplets, making it easier for microbes to consume, and further break it down into less harmful compounds.
    • Natural actions in aquatic environments such as weathering, evaporation, emulsification, biodegradation and oxidation can also accelerate the recovery of an affected area. But these occur differently in freshwater and marine environments.

  • Myth of the pristine forest

    • The COVID-19 pandemic has driven migrant workers back to their villages, including many situated inside or on the fringes of forested areas, including sanctuaries and national parks.
    • Even as they seek to remake livelihoods there, a new battle has emerged between the forest department (FD) and these local communities.
    • It pertains to the declaration of a Critical Wildlife Habitat (CWH), which a PIL in the Bombay High Court seeks to get the department to urgently notify.

    Try this question for mains:

    Forest dwellers are integral to the very survival and sustainability of the forest ecosystem. Analyse.

    What is Critical Wildlife Habitat (CHW)?

    • CWH is a provision under the Forest Rights Act, 2006 (FRA).
    • The Act primarily focuses on recognising the historically-denied rights of forest-dwellers to use and manage forests.
    • The CWH provision, however, is an attempt to assuage concerns of wildlife conservationists.
    • It allows for the possibility that in protected areas (PAs) — wildlife sanctuaries and national parks — these rights could be attenuated, and, if absolutely necessary, forest-dwellers could be relocated in the interest of wildlife conservation.

    Forest dwellers vs. Wildlife

    • Conservationists believe that wildlife needs absolutely “inviolate” areas — those devoid of humans and human activities.
    • Many others believe human-wildlife co-existence is generally possible and must be promoted if we are to have “socially just conservation”.

    Achieving balanced conservation: The FRA provisions

    • A careful reading of the CWH provisions in the FRA shows that it is open to both possibilities, as long as they are arrived at through a rigorous and participatory process.
    • It requires setting up a multi-disciplinary expert committee, including representatives from local communities.
    • It also requires determining — using “scientific and objective criteria” and consultative processes — whether, and wherein the PA, the exercise of forest rights will cause irreversible damages.
    • It then requires determining whether coexistence is possible through a modified set of rights or management practices.
    • Only if the multi-stakeholder expert committee agrees that co-existence or other reasonable options are not possible, should relocation be taken up, again with the informed consent of the concerned gram sabhas.
    • For any such process to commence, the Act requires that all forest rights under the FRA must first be recognised.

    Issues with the FRA

    (1) Concerns of eviction

    • Hardline conservationists took FRA as a great opportunity to complete its agenda of evicting forest-dwellers from PAs.
    • It has been observed that many villages were resettled when they had rights claims pending, others had their claims illegally rejected or incompletely granted, and several had not even applied to this controversy erupted.
    • However, there are settlements in some of these PAs, and of course, people in villages adjacent to all the PAs are likely to have customary rights.
    • In spite of the court ordering rapid completion of the rights recognition process, there has been almost no progress on this front.

    (2) Issues with expert committees

    • The constitution of the expert committees is faulty. They do not contain expert social scientists familiar with the area. Wildlife enthusiasts are sometimes substituted for experts in life sciences.
    • Many members have challenged the very constitutionality of the FRA, making a travesty of the idea of “objectivity” in the process.

    (3) Criteria judging the damages

    • The criteria being used by the committees to determine the threat of “irreversible damage” to wildlife are quite extreme and are not supported by any consensus even among ecologists.
    • There are no objective criteria decided yet by these committees.

    Conclusion

    • The FRA begins by recognising that forest dwellers “are integral to the very survival and sustainability of the forest ecosystem”.
    • In that context, the CWH provision should not be seen as simply a tool for evicting forest-dwellers to create so-called “inviolate” spaces.
    • It is an opportunity to rigorously and participatorily explore all avenues of co-existence.
    • Such co-existence is indeed possible. In general, forest-dwellers harbour both the knowledge and the attitudes needed for conservation.
    • Co-managing PAs is, therefore, the most effective and socially just long-term solution, and relocation should be seen as the absolute last resort.

    B2BASICS

    Forest Rights act

  • Species in news: Great Indian Hornbill

    A study based on satellite data has flagged a high rate of deforestation in a major hornbill habitat in Arunachal Pradesh.

    Try this PYQ:

    Q. In which of the following regions of India are you most likely to come across the ‘Great Indian Hornbill’ in its natural habitat? (CSP 2016)

    (a) Sand deserts of northwest India

    (b) Higher Himalayas of Jammu and Kashmir

    (c) Salt marshes of western Gujarat

    (d) Western Ghats

    About Great Indian Hornbill

    IUCN status: Vulnerable (uplisted from Near Threatened in 2018), CITES: Appendix I

    • The great hornbill (Buceros bicornis) also known as the great Indian hornbill or great pied hornbill, is one of the larger members of the hornbill family.
    • The great hornbill is long-lived, living for nearly 50 years in captivity.
    • It is predominantly fruit-eating, but is an opportunist and preys on small mammals, reptiles and birds.
    • Its impressive size and colour have made it important in many tribal cultures and rituals.
    • A large majority of their population is found in India with a significant proportion in the Western Ghats and the Nilgiris.
    • The nesting grounds of the birds in the Nilgiris North Eastern Range are also believed to support some of their highest densities.

    Their ecological significance

    • Referred to as ‘forest engineers’ or ‘farmers of the forest’ for playing a key role in dispersing seeds of tropical trees, hornbills indicate the prosperity and balance of the forest they build nests in.

    Threats

    • Hornbills used to be hunted for their casques — upper beak — and feathers for adorning headgear despite being cultural symbols of some ethnic communities in the northeast, specifically the Nyishi of Arunachal Pradesh.
    • Illegal logging has led to fewer tall trees where the bird’s nest.

    Back2Basics: Hornbill Festival

    • The Hornbill Festival is a celebration held every year from 1 – 10 December, in Kohima, Nagaland.
    • The festival was first held in the year 2000.
    • It is named after the Indian hornbill, the large and colourful forest bird which is displayed in the folklore of most of the state’s tribes.
    • Festival highlights include the traditional Naga Morungs exhibition and the sale of arts and crafts, food stalls, herbal medicine stalls, flower shows and sales, cultural medley – songs and dances, fashion shows etc.