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GS Paper: GS3-18.Conservation, Environmental Pollution and Degradation, Environmental Impact Assessment.

  • [pib] Formation of Blue Straggler

    Carrying out the first-ever comprehensive analysis of blue stragglers, Indian researchers found that half of the blue stragglers in their sample are formed through mass transfer from a close binary companion star.

    What are Blue Stragglers?

    • A blue straggler is a main-sequence star in an open or globular cluster that is more luminous and bluer than stars at the main sequence turnoff point for the cluster.
    • The most likely explanation is that blue stragglers are the result of stars that come too close to another star or similar mass object and collide.
    • The newly-formed star has thus a higher mass and occupies a position on the HR diagram which would be populated by genuinely young stars.
    • One-third of them are likely formed through collisions of 2 stars, and the remaining are formed through interactions of more than 2 stars.

    How are they formed?

    • A bunch of stars born at the same time from the same cloud form a star cluster.
    • As time passes, each star evolves differently depending on its mass.
    • The most massive and bright stars evolve and move off the main sequence creating a bend in their track, known as the turnoff.
    • Stars above this bend or brighter and hotter stars are not expected in a cluster, as they leave the main sequence to become red giants.
    • But in 1953, Allan Sandage found that some stars seem to be hotter than the turnoff of the parent cluster.

    Behind the nomenclature

    • Initially, these blue stars still straggling above the turnoff were not part of these clusters.
    • However, later studies confirmed that these stars are indeed cluster members, and they were termed “Blue Stragglers”.
    • The only probable way these stars can still be present in these clusters is if they have somehow acquired extra mass along the way while on the main sequence.
    • Confirming the mechanisms of the mass gain required a study using a large sample of blue-straggler stars and estimates of the mass they have gained.

    What have Indian researchers found?

    • Research showed that these stars are primarily present in the older and massive star clusters. And due to their large mass, they are segregated towards the centre of the clusters.
    • The researchers compared the mass of the blue stragglers to the mass of the turnoff stars (which are the most massive ‘normal’ stars in the cluster) and predicted the formation mechanisms.
    • The study will help improve understanding of these stellar systems to uncover exciting results in studies of large stellar populations, including galaxies.
    • Following these findings, the researchers are conducting detailed analyses of individual blue stragglers in the catalog to obtain their stellar properties.
  • Behler Turtle Conservation Award

    Indian biologist Shailendra Singh has been awarded the Behler Turtle Conservation Award for bringing three critically endangered turtle conservation species back from the brink of extinction.

    Behler Turtle Conservation Award

    • The Award is a major annual international award honoring excellence in the field of tortoise and freshwater turtle conservation and biology, and leadership in the chelonian conservation and biology community.
    • It is co-presented by the Turtle Survival Alliance (TSA), the IUCN/SSC Tortoise and Freshwater Turtle Specialist Group (TFTSG) among others.
    • It is widely considered the “Nobel Prize” of turtle conservation and biology.

    Citation for the 2021 Award

    • For some species, such as the Red-crowned Roofed Turtle (Batagur kachuga), Northern River Terrapin (Batagur Baska), and Black Softshell Turtle (Nilssonia nigricans) Dr. Singh and his team’s efforts are the last hope for their wild survival in the country.
    • In just 15 years, there are few individuals that have made such monumental contributions to turtle conservation.

    Turtles in India

    • The Northern River Terrapin (Batagur Baska) is being conserved at the Sunderbans; the Red-crowned Roofed Turtle (Batagur kachuga) at Chambal; and the Black Softshell Turtle (Nilssonia nigricans) at different temples in Assam.
    • These critically endangered turtles are being conserved as a part of TSA India’s research, conservation breeding and education programme in different parts of the country.
    • There are 29 species of freshwater turtles and tortoises in the country.

    About Turtle Survival Alliance (TSA)

    • The TSA was formed in 2001 as an International Union for Conservation of Nature (IUCN) partnership for sustainable captive management of freshwater turtles and tortoises.
    • This alliance arose in response to the rampant and unsustainable harvest of Asian turtle populations to supply Chinese markets, a situation known as the Asian Turtle Crisis.

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  • India must commit to net zero emissions

    Context

    The United Nations Climate Change Conference (COP26) in November in Glasgow is shaping up to be the most important climate meeting since the Paris Agreement in 2015.

    What are net-zero emissions?

    Carbon neutrality refers to achieving net-zero carbon dioxide emissions. This can be done by balancing emissions of carbon dioxide with its removal or by eliminating emissions from society.

    Increase in pace and scale of climate action

    • Over 50% of the global economy is already committed to net zero emissions by 2050.
    • Over 100 countries have already committed to net zero emissions by 2050, with more expected at COP26.
    • The pace and scale of climate action are only set to increase, with the recent IPCC report unequivocal on the need for urgent and stronger responses.
    • It is not only governments that are increasing climate action. The business world is too, not just to protect themselves against the risks of climate change but also to take advantage of the massive opportunities arising as the global economy shifts to net-zero emissions.

    Why India should commit to a net-zero target

    • National interest due to vulnerability: India itself has a national interest in ambitious global and national climate action.
    • It is among the most vulnerable countries to climate change and, therefore, should be among the more active against the threats.
    • Influence as a rising power: Second, as a rising power, India naturally seeks stronger influence globally.
    • Being an outlier on the global challenge facing our generation does not support this aim.
    • Drag on international diplomacy: India’s reluctance to commit to net-zero will become a significant drag on India’s international diplomacy.
    • This applies not just to key relationships like with the U.S., but also with much of the Group of 77 (G77) states, who are increasingly concerned to see climate action, and in multilateral groupings such as the United Nations and ASEAN-APEC.
    • Interconnected with the economy: There is no longer a trade-off between reducing emissions and economic growth.
    • For example, the U.K. has reduced emissions by over 40% and grown its economy by over 70% since 1990.
    • Solar energy costs have fallen 90% in recent years, providing the cheapest electricity in India ever seen.
    • Also, given the negative impacts, addressing climate change in India’s economic development is now central to success, not an added luxury to consider.
    • The transition of the global economy to net zero emissions is the biggest commercial opportunity in history.
    • In just the energy sector alone, an estimated $1.6 to $3.8 trillion of investment is required every year until 2050.

    India’s climate actions

    • India is set to significantly exceed its Paris Agreement commitment of reducing the emissions intensity of its GDP by 33-35% below 2005 levels by 2030.
    • Emphasis on renewable: India is impressing the world with its leading roll-out of renewable energy and target for 450GW by 2030, linked to its leadership on the International Solar Alliance and recent national hydrogen strategy.
    • Corporates: Indian corporates are also stepping up, with the Tata Group winning awards on sustainability, Mahindra committing to net-zero by 2040, and Reliance by 2035.
    • Notwithstanding reasonable arguments about historical responsibility, per capita emissions, and equity, India’s national interests in climate action are now engaged in ways that go significantly beyond waiting for donor support to drive ambition.

    The way forward: International cooperation

    • The world needs to work together for success in the form of stronger political engagement, policy support in areas of mutual challenge such as energy policy, carbon markets, and economic recovery.
    • Practical support and cooperation in areas like renewable energy and integrating it with the national grid, zero-emissions transport, decarbonising hard to abate sectors like steel, cement, and chemicals, and decarbonising agriculture offer significant scope to raise ambition.
    • As does working with India on innovative green financing for decarbonizing investment.

    Conclusion

    India’s tryst with destiny rests in its own remarkable hands, as it always has been. In a land where the earth is called mother, and Mahatma Gandhi, major religions, and the Constitution enshrine environmental care, commitment to net zero emissions by 2050 should almost be foretold.

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  • Ladakh adopts State Animal and Bird

    Ladakh has adopted two endangered species, snow leopard and black-necked crane, as State animal and State bird, two years after it was carved out as a separate Union Territory (UT) from the erstwhile State of J&K.

    Snow Leopard

    • The snow leopard (Panther unica) and black-necked crane (Grus nicricollis).
    • Snow leopard, whose numbers are dwindling worldwide, has been categorized as “vulnerable” in the International Union for Conservation of Nature Red List.
    • In total, there are about 7,500 snow leopards left in the world, out of which 500 are in India.
    • However, experts state that the population of snow leopards is between 200-300 in Ladakh alone.

    Black-necked Crane

    • The black-necked crane is found in eastern Ladakh’s high-altitude wetlands and marshes.
    • It is mostly listed as Near Threatened on the International Union for Conservation of Nature (IUCN) red list.
    • Considered loyal couples, they are only found in Ladakh’s Changthang region. They arrive in March for breeding and migrate by October end or early November.
    • It was the State bird of J&K before August 5, 2019.

    About Ladakh

    • Ladakh was established as a union territory of India on 31 October 2019, following the passage of the Jammu and Kashmir Reorganization Act.
    • Prior to that, it was part of the Jammu and Kashmir state. Ladakh is the largest and the second least populous union territory of India.
    • It extends from the Siachen Glacier in the Karakoram range to the north to the main Great Himalayas to the south.
    • The eastern end, consisting of the uninhabited Aksai Chin plains, is claimed by the Indian Government as part of Ladakh and has been under Chinese control since 1962.
    • The largest town in Ladakh is Leh, followed by Kargil, each of which headquarters is a district.
    • The Leh district contains the Indus, Shyok and Nubra river valleys. The Kargil district contains the Suru, Dras and Zanskar river valleys.

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  • Managing natural resources

    Context

    A project in Meghalaya empowers communities to take informed action pertaining to their environment.

    Depletion of natural resources in Meghalaya

    • In recent years, many parts of Meghalaya have witnessed the loss of forest cover and natural resources have rapidly deteriorated.
    • The State, known to have spots designated as the ‘wettest places’ on earth, is now facing a severe water crisis.
    • Natural resource management becomes critical in this context.

    Challenges in natural resource management

    • Traditional practices on sustainable use of natural resources have been passed down from one generation to another.
    • Overexploitation: This indigenous knowledge began to slowly fade, however, owing to population growth,  the quest for unsustainable developmental activities, and indiscriminate exploitation of natural resources.
    • Inaccessibility of knowledge: Another roadblock to natural resource management was knowledge inaccessibility among rural communities.

    Providing knowledge: Landscape Management Project

    • The government wanted to see if, when provided with the correct knowledge, solutions to problems can be devised and even implemented by community members themselves.
    • The World Bank-supported Meghalaya Community-Led Landscape Management Project seeks to reactivating the community’s connection to natural resources and enabling them to tackle the resource crisis.
    • How the project worked: cross-functional teams with diverse expertise were set up.
    • The Mahatma Gandhi National Rural Employment Guarantee Scheme became the main scheme channelizing resources to impact poor households so that there was systematic convergence of all line departments such as agriculture, horticulture, soil, and water conservation.
    • The programme leverages technology and the youth population.
    • Leveraging technology, more than 2,000 village community facilitators have already been trained and are working towards climate change reversal.
    • Autonomy: To build autonomy, simple tools are used.
    • They have been designed keeping in mind many things: creating community agency, building the capacities of all persons in the programme, and ensuring frequent interactions among them.
    • Leveraging technology: Technology empowers them with real-time data, which in turn results in better programme governance, transparency, and accountability.
    • Communities are now able to articulate the complexities of their problems through a scientific lens and create their own natural resource management plans.
    • To carry forward this momentum, there is a plan to launch a Centre of Excellence in Meghalaya, a one-stop centre for natural resources management.

    Conclusion

    The project intends to empower thousands of village community facilitators and enable them to articulate the complexities of their problems through a scientific lens and create their own natural resource management plans.

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  • Nationally Determined Contributions

    Context

    Despite accomplishments, global pressures are intensifying on India to commit more towards the Conference of the Parties (COP26), scheduled for November 2021 in Glasgow.

    India’s accomplishments

    • At the fifth anniversary of the Paris Agreement on Climate Change (December 2020), India was the only G20 nation compliant with the agreement.
    • India has been ranked within the top 10 for two years consecutively in the Climate Change Performance Index.
    • The Unnat Jyoti by Affordable LEDs for All (UJALA) scheme is the world’s largest zero-subsidy LED bulb programme for domestic consumers.
    •  India provided leadership for setting up the International Solar Alliance, a coalition of solar-resource-rich countries, and the Coalition for Disaster Resilient Infrastructure.

    Why it is unfair to pressure India on climate action

    We can attempt to answer the question by comparing the achievements of other countries vis-à-vis India’s performance.

    • Historical perspective: World Bank data for CO2 emissions (metric tons per capita) over two decades since the Kyoto protocol informs that at the current rate, both China and the U.S. could emit five times more than India in 2030.
    • The U.K.’s emission levels could be more than 1.5 times that of India.
    • Brazil, with its dense forests, may end up at similar levels.
    • Latest efforts: Last year, China, the world’s largest GHG emitter, joined the ‘race to zero’ and targets carbon neutrality by 2060.
    • Interestingly, it hopes to peak CO2 emissions by 2030 for bending the emissions curve.
    • Recently, the U.S. rejoined the Paris Agreement and committed to reducing emissions by 50%-52% in 2030 and reaching net-zero emissions economy-wide by 2050.
    • The French government, during the novel coronavirus pandemic, set green conditions for bailing out its aviation industry.
    • However, the analysts say that no baseline for reducing emissions from domestic flights was fixed.
    • In Australia, complicated domestic politics prevented them from addressing the problem, despite the country being vulnerable, and stretches of the famous Great Barrier Reef having died in recent years.

    India’s performance

    • Exceeding the NDC commitment: India is on track (as reports/documents show) to meet and exceed the NDC commitment to achieve 40% electric power installed capacity from non-fossil fuel-based sources by 2030.
    • Reduction in emission intensity of GDP: Against the voluntary declaration for reducing the emission intensity of GDP by 20%-25% by 2020, India has reduced it by 24% between 2005-2016.
    • More importantly, we achieved these targets with around 2% out of the U.S.$100 billion committed to developing nations in Copenhagen (2009), realised by 2015.
    • Renewable energy expansion: India is implementing one of the most extensive renewable energy expansion programmes to achieve 175 GW of renewable energy capacity by 2022 and 450 GW by 2030.
    • Investment in green measures: As part of the fiscal stimulus after the pandemic, the Government announced several green measures, including:
    • a $26.5-billion investment in biogas and cleaner fuels,
    • $3.5 billion in incentives for producing efficient solar photovoltaic (PV)
    • and advanced chemistry cell battery, and $780 million towards an afforestation programme.
    •  India’s contribution to global emissions is well below its equitable share of the worldwide carbon budget by any equity criterion.

    Conclusion

    To sum up, India has indeed walked the talk. Other countries must deliver on their promises early and demonstrate tangible results ahead of COP26.

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  • Leaded Petrol is officially eradicated

    The use of leaded petrol has been eradicated from the globe, a/c to the UN Environment Programme (UNEP).

    What is Leaded Petrol?

    • Tetraethyl-lead (TEL) is a petro-fuel additive, first being mixed with petrol beginning in the 1920s as a patented octane rating booster that allowed engine compression to be raised substantially.
    • This in turn caused increased vehicle performance and fuel economy.
    • The practice of adding tetraethyl lead to petrol had spread widely to all countries soon after its anti-knock and octane-boosting properties were discovered.
    • TEL is still used as an additive in some grades of aviation gasoline.

    Issues with leaded petrol

    • Lead is toxic, affects multiple body systems and is particularly harmful to young children.
    • It affects the brain, liver, kidneys, and bones. Lead is measured in the blood to understand exposure.
    • Lead in bone is released into the blood during pregnancy and becomes a source of exposure to the developing foetus.
    • More recent research has indicated that lead can damage the infant brain even at blood levels as low as 5 microunits per decilitre (μ/dl).

    India’s tryst with leaded petrol

    • India was among those countries that took early action to phase out leaded petrol. The process of phase down that had started in 1994, got completed in 2000.
    • Initially, low-leaded petrol was introduced in Delhi, Mumbai, Kolkata and Chennai in 1994, followed by unleaded petrol in 1995.
    • The entire country got low-leaded petrol in 1997 while leaded fuel was banned in the National Capital Territory of Delhi.
    • The final introduction of unleaded petrol in the entire country was mandated in April 2000.
    • This decision was also catalyzed by the Supreme Court order that had directed the introduction of unleaded petrol to enable the adoption of catalytic converters in petrol cars.

    Significance of phasing out

    • It is a milestone that will prevent more than 1.2 million premature deaths and save world economies over $2.4 trillion annually.
    • It has taken 100 years to stop the use of leaded fuel finally.

    Try answering this PYQ:

    Q.Lead, ingested or inhaled, is a health hazard. After the addition of lead to petrol has been banned, what still are the sources of lead poisoning? (CSP 2012)

    1. Smelting units
    2. Pens pencils
    3. Paints
    4. Hair oils and cosmetics

    Select the correct answer using the codes given below:

    (a) 1, 2 and 3 only

    (b) 1 and 3 only

    (c) 2 and 4 only

    (d) 1, 2, 3 and 4

     

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  • Places in news: Pantanal Wetlands

    Pantanal, the world’s largest tropical wetlands is facing a severe crisis due to wildfires and climate change.

    Pantanal Wetlands

    • The Pantanal is a natural region encompassing the world’s largest tropical wetland area, and the world’s largest flooded grasslands.
    • It is located mostly within the Brazilian and extends to some portions of Bolivia and Paraguay.
    • It sprawls over an area estimated at between 140,000 and 195,000 square kilometer.
    • Roughly 80% of the Pantanal floodplains are submerged during the rainy seasons, nurturing a biologically diverse collection of aquatic plants and helping to support a dense array of animal species.

    Risks faced

    • Unlike the Amazon rainforest, vegetation in the Pantanal has evolved to coexist with fire — many plant species there require the heat from fires to germinate.
    • Often caused by lightning strikes, those natural fires spring up at the end of the dry season, but the surrounding floodplains prevent them from spreading.
    • What’s different now is the drought, contributing further to the unusually dry conditions and exacerbating the fire risk.

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  • Places in news: Deepar Beel Wildlife Sanctuary

    The Ministry of Environment, Forest and Climate Change has notified the eco-sensitive zone of the Deepar Beel Wildlife Sanctuary on the south-western edge of Guwahati.

    Deepar Beel

    • Deepar Beel is one of the largest freshwater lakes in Assam and the State’s only Ramsar site besides being an Important Bird Area.
    • It is located to the south-west of Guwahati city, in Kamrup Metropolitan district.
    • It is a permanent freshwater lake, in a former channel of the Brahmaputra River, to the south of the main river.
    • It is also called a wetland under the Ramsar Convention which has listed the lake in November 2002, as a Ramsar Site for undertaking conservation measures on the basis of its biological and environmental importance.

    Major threats

    • Deepar Beel has long been used as a sponge for Guwahati’s sewage via a couple of streams.
    • The wetland has also suffered from seepage of toxins from a garbage dump at Boragaon adjoining it.
    • It has for decades been threatened by a railway track — set to be doubled and electrified — on its southern rim, a garbage dump, and encroachment from human habitation and commercial units.
    • The water has become toxic and it has lost many of its aquatic plants that elephants would feed on.

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  • Animal Discoveries 2020 report by ZSI

    India has added 557 new species to its fauna reveals Animal Discoveries 2020, a document published recently by the Zoological Survey of India (ZSI).

    Major species discovered

    The number of faunal species in India has climbed to 1,02,718 species. Among the new species, some interesting species discovered in 2020 are:

    • Trimeresurus salazar, a new species of green pit viper discovered from Arunachal Pradesh;
    • Lycodon deccanensis, the Deccan wolf snake discovered from Karnataka; and
    • Sphaerotheca Bengaluru, a new species of burrowing frog named after the city of Bengaluru.
    • Xyrias anjaalai, a new deep-water species of snake eel from Kerala;
    • Glyptothorax giudikyensis, a new species of catfish from Manipur; and
    • Clyster galateansis, a new species of scarab beetles from the Great Nicobar Biosphere.

    Visitor species

    • Myotis cf. frater, a bat species earlier known from China, Taiwan and Russia, has been reported for the first time from Uttarakhand in India
    • Zoothera citrina gibsonhilli, an orange-headed thrush earlier known from southern Myanmar to south Thailand (central Malay peninsula) was reported for the first time from India based on a collection made from the Narcondam island in the Andaman & Nicobar Islands.

    Significance

    • The ZSI publication shows that India is a mega biodiverse country, rich in biodiversity, with 23.39% of its geographical area under forest and tree cover.
    • India is positioned 8th in mega biodiversity countries in the world with 0.46 BioD index which is calculated by its percentage of species in each group relative to the total global number of species in each group.

    About Zoological Survey of India

    • The ZSI was set up by British zoologist Thomas Nelson Annandale, in 1916.
    • It is the premier taxonomic research organization in India.
    • It was established to promote surveys, exploration and research leading to advancement of our knowledge of various aspects of the exceptionally rich animal life of India.
    • The ZSI had its genesis as the Zoological Section of the Indian Museum at Calcutta in 1875.
    • Since its inception, the ZSI has been documenting the diversity and distribution of the fauna of India towards carrying out its mandate of conducting exploration-cum-taxonomic-research programmes.
    • The ZSI has published an extremely large amount of information on all animal taxa, from Protozoa to Mammalia.

    Try answering this PYQ:

    Q.With reference to India’s Biodiversity, Ceylon frogmouth, Coppersmith barbet, Gray-chinned minivet and White-throated redstart are: (CSP 2020)

    (a) Birds

    (b) Primates

    (c) Reptiles

    (d) Amphibians

     

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