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Subject: Conservation & Mitigation

1. Conservation Progs.
2. Worldwide initiatives
3. Mitigation Strategies
4. Conventions and Protocols

  • Detecting Microplastics in Human Blood

    A study by researchers from The Netherlands has found Microplastics in blood samples. About half of these were PET (polyethylene tertraphthalate) plastics, which is used to make food grade bottles.

    What are Microplastics?

    • Microplastics are tiny bits of various types of plastic found in the environment.
    • The name is used to differentiate them from “macroplastics” such as bottles and bags made of plastic.
    • There is no universal agreement on the size of microplastics. It defines microplastic as less than 5mm in length.
    • However, for the purposes of this study, since the authors were interested in measuring the quantities of plastic that can cross the membranes and diffuse into the body via the blood stream.
    • Hence they agreed on an upper limit on the size of the particles as 0.0007 millimetre.

    What were the plastics that the study looked for in the blood samples?

    • The study looked at the most commonly used plastic polymers.
    • These were polyethylene tetraphthalate (PET), polyethylene (used in making plastic carry bags), polymers of styrene (used in food packaging), poly (methyl methylacrylate) and poly propylene.
    • They found a presence of the first four types.

    Significance of the study

    • Making a human health risk assessment in relation to plastic particles is not easy, perhaps not even possible, due to the lack of data on exposure of people to plastics.
    • In this sense, it is important to have studies like this one.
    • The authors of the paper also remark that validated methods to detect the tiny (trace) amounts of extremely small-sized (less than 10 micrometre) plastic particles are lacking.
    • Hence this study, which builds up a methods to check the same, is important.

    Health hazard of microplastics

    • It is not yet clear if these microplastics can cross over from the blood stream to deposit in organs and cause diseases.
    • The report point out that the human placenta has shown to be permeable to tiny particles of polystyrene ( 50, 80 and 24 nanometre beads).
    • Experiments on rats where its lungs were exposed to polystryrene spheres (20 nanometre) led to translocation of the nanoparticles to the placental and foetal tissue.
    • Oral administration of microplastics in rats led to accumulation of these in the liver, kidney and gut.
    • Further studies have to be carried out to really assess the impact of plastics on humans.

     

    Try this PYQ:

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

    (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.

     

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  • Gahirmatha beach witnesses Arribada

    About 2.45 lakh Olive Ridley sea turtles crawled ashore on the Nasi-II beach of the Gahirmatha Marine Sanctuary along the Odisha coast for laying eggs, marking one of the largest opening day arrivals of turtles at the site.

    Olive Ridley Turtles

    • The Olive Ridley Sea Turtle (Lepidochelys olivacea), also known as the Pacific ridley sea turtle, is a medium-sized species of sea turtle found in warm and tropical waters, primarily in the Pacific and Indian Oceans.
    • In the Indian Ocean, the majority of olive ridleys nest in two or three large groups at Rushikulya rookery near Gahirmatha in Odisha.
    • The coast of Odisha in India is the largest mass nesting site for the olive ridley, followed by the coasts of Mexico and Costa Rica.
    • The species is listed as Vulnerable in the IUCN Red List, Appendix 1 in CITES, and Schedule 1 in Wildlife Protection Act, 1972.

    Special feature: Mass nesting

    • They are best known for their behavior of synchronized nesting in mass numbers, termed Arribadas.
    • Interestingly, females return to the very same beach from where they first hatched, to lay their eggs.
    • They lay their eggs in conical nests about one and a half feet deep which they laboriously dig with their hind flippers.
    • They hatch in 45 to 60 days, depending on the temperature of the sand and atmosphere during the incubation period.

     

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  • Noise Pollution in India

    The city of Moradabad in Uttar Pradesh is the second-most noise polluted city globally, according to a recent report title Frontier 2022 by the United Nations Environment Programme (UNEP).

    What is Noise Pollution?

    • Noise pollution, also known as environmental noise or sound pollution, is the propagation of noise with ranging impacts on the activity of human or animal life, most of them harmful to a degree.
    • It is generally defined as regular exposure to elevated sound levels that may lead to adverse effects in humans or other living organisms.
    • The source of outdoor noise worldwide is mainly caused by machines, transport, and propagation systems.
    • Poor urban planning may give rise to noise disintegration or pollution, side-by-side industrial and residential buildings can result in noise pollution in the residential areas.
    • Some of the main sources of noise in residential areas include loud music, transportation (traffic, rail, airplanes, etc.), maintenance, construction, electrical generators, wind turbines, explosions, and people etc.

    Defining Noise Pollution

    • Sounds with a frequency over 70 db are considered harmful to health.
    • The World Health Organization (WHO) had recommended a 55 db standard for residential areas in the 1999 guidelines, while for traffic and business sectors, the limit was 70 db.
    • The WHO set the limit of noise pollution on the road at 53 db in 2018, taking into account health safety.

    Noise Pollution in India

    • The report identifies 13 noise polluted cities in south Asia. Five of these, including Moradabad, are in India, which have recorded alarming levels of noise pollution:
    1. Kolkata (89 db)
    2. Asansol (89 db)
    3. Jaipur (84 db)
    4. Delhi (83 db)
    • The noise pollution figures given in the report relate to daytime traffic or vehicles.
    • Moradabad has recorded noise pollution of a maximum of 114 decibels (db). The Frontier 2022 report mentions a total of 61 cities.

    Case in the neighborhood

    • The highest noise pollution of 119 db has been recorded in Dhaka, the capital of Bangladesh.
    • At third place is Pakistan’s capital Islamabad, where the noise pollution level has been recorded at 105 db.

    Hazards created

    • High levels of noise pollution affect human health and well-being by having an effect on sleep.
    • This has a bad effect on the communication of many animal species living in the area and their ability to hear.
    • Regular exposure for eight hours a day to 85 decibels of sound can permanently eliminate the ability to hear.
    • Not only that, exposure to relatively low noise pollution for long periods in cities can harm physical and mental health.

     

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  • Re-introducing African Cheetahs to India

    The cheetah, which became extinct in India after Independence, is all set to return with the Union Government launching an action plan in Kuno National Park in Madhya Pradesh.

    According to the plan, about 50 of these big cats will be introduced in the next five years, from the Africa savannas, home to cheetahs, an endangered species.

    Distribution of cheetahs in India

    • Historically, Asiatic cheetahs had a very wide distribution in India.
    • There are authentic reports of their occurrence from as far north as Punjab to Tirunelveli district in southern Tamil Nadu, from Gujarat and Rajasthan in the west to Bengal in the east.
    • Most of the records are from a belt extending from Gujarat passing through Maharashtra, Madhya Pradesh, Uttar Pradesh, Chhattisgarh, Jharkhand and Odisha.
    • There is also a cluster of reports from southern Maharashtra extending to parts of Karnataka, Telangana, Kerala and Tamil Nadu.
    • The distribution range of the cheetah was wide and spread all over the subcontinent. They occurred in substantial numbers.
    • The cheetah’s habitat was also diverse, favouring the more open habitats: scrub forests, dry grasslands, savannahs and other arid and semi-arid open habitats.

    What caused the extinction of cheetahs in India?

    • The major reasons for the extinction of the Asiatic cheetah in India:
    1. Reduced fecundity and high infant mortality in the wild
    2. Inability to breed in captivity
    3. Sport hunting and
    4. Bounty killings
    • It is reported that the Mughal Emperor Akbar had kept 1,000 cheetahs in his menagerie and collected as many as 9,000 cats during his half century reign from 1556 to 1605.
    • The cheetah numbers were fast depleting by the end of the 18th century even though their prey base and habitat survived till much later.
    • It is recorded that the last cheetahs were shot in India in 1947, but there are credible reports of sightings of the cat till about 1967.

    Conservation objectives for their re-introduction

    • Based on the available evidence it is difficult to conclude that the decision to introduce the African cheetah in India is based on science.
    • Science is being used as a legitimising tool for what seems to be a politically influenced conservation goal.
    • This also in turn sidelines conservation priorities, an order of the Supreme Court, socio-economic constraints and academic rigour.
    • The issue calls for an open and informed debate.

    What is the officially stated goal?

    • To establish viable cheetah meta-population in India that allows the cheetah to perform its functional role as a top predator
    • To provide space for the expansion of the cheetah within its historical range thereby contributing to its global conservation efforts

    Issues in re-introduction

    • Experts find it difficult whether the African cheetahs would find the sanctuary a favorable climate as far as the abundance of prey is concerned.
    • The habitat of cheetahs needed to support a genetically viable population.

    Back2Basics: Asiatic Cheetah

    • Cheetah, the world’s fastest land animal was declared extinct in India in 1952.
    • The Asiatic cheetah is classified as a “critically endangered” species by the IUCN Red List, and is believed to survive only in Iran.
    • It was expected to be re-introduced into the country after the Supreme Court lifted curbs for its re-introduction.
    • From 400 in the 1990s, their numbers are estimated to have reached to 50-70 today, because of poaching, hunting of their main prey (gazelles) and encroachment on their habitat.

     

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  • What are Karewas?

    Kashmir’s highly fertile alluvial soil deposits called ‘karewas’ are being destroyed in the name of development, much to the peril of local people

    What are Karewas?

    • The Kashmir valley is an oval-shaped basin, 140 km long and 40 km wide, trending in the NNW–SSE direction.
    • It is an intermountain valley fill, comprising of unconsolidated gravel and mud.
    • A succession of plateaus is present above the Plains of Jhelum and its tributaries.
    • These plateau-like terraces are called ‘Karewas’ or ‘Vudr’ in the local language.
    • These plateaus are 13,000-18,000 metre-thick deposits of alluvial soil and sediments like sandstone and mudstone.
    • This makes them ideal for cultivation of saffron, almonds, apples and several other cash crops.

    Significance of Karewas

    • Today, the karewa sediments not only hold fossils and remnants of many human civilisations and habitations, but are also the most fertile spots in the valley.
    • Kashmir saffron, which received a Geographical Indication (GI) tag in 2020 for its longer and thicker stigmas, deep-red colour, high aroma and bitter flavour, is grown on these karewas.

    How are they formed?

    • The fertility of these patches is believed to be the result of their long history of formation.
    • When formed during the Pleistocene period (2.6 million years to 11,700 years ago), the Pir Panjal range blocked the natural drainage in the region and formed a lake spanning 5,000 sq km.
    • Over the next few centuries, the water receded, making way for the valley and the formation of the karewas between the mountains.

    Threats to Karewas

    • Despite its agricultural and archaeological importance, karewas are now being excavated to be used in construction.
    • Between 1995 and 2005, massive portions of karewas in Pulwama, Budgam and Baramulla districts were razed to the ground for clay for the 125-km-long Qazigund-Baramulla rail line.
    • The Srinagar airport is built on the Damodar karewa in Budgam.

     

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  • Tiger Density in India

    Preliminary findings of a study by the Wildlife Institute of India (WII) suggest that the density of tigers in the Sunderbans may have reached the carrying capacity of the mangrove forests, leading to frequent dispersals and a surge in human-wildlife conflict.

    Tiger Density of India

    • In the Terai and Shivalik hills habitat — think Corbett tiger reserve, for example — 10-16 tigers can survive in 100 sq km.
    • This slides to 7-11 tigers per 100 sq km in the reserves of north-central Western Ghats such as Bandipur, and to 6-10 tigers per 100 sq km in the dry deciduous forests, such as Kanha, of central India.
    • The correlation between prey availability and tiger density is fairly established.
    • There is even a simple linear regression explaining the relationship in the 2018 All-India Tiger report that put the carrying capacity in the Sunderbans “at around 4 tigers” per 100 sq km.
    • A joint Indo-Bangla study in 2015 pegged the tiger density at 2.85 per 100 sq km after surveying eight blocks spanning 2,913 sq km across the international borders in the Sunderbans.

    Conflict: cause or effect

    • The consequence, as classical theories go, is frequent dispersal of tigers leading to higher levels of human-wildlife conflict in the reserve peripheries.
    • Physical (space) and biological (forest productivity) factors have an obvious influence on a reserve’s carrying capacity of tigers.
    • What also plays a crucial role is how the dispersal of wildlife is tolerated by people — from the locals who live around them to policymakers who decide management strategies.
    • More so when different land uses overlap and a good number of people depend on forest resources for livelihood.

    Why tiger corridors are not a solution?

    • But though vital for genes to travel and avoid a population bottleneck, wildlife corridors may not be the one-stop solution for conflict.
    • First, not all dispersing tigers will chance upon corridors simply because many will find territories of other tigers between them and such openings.
    • Even the lucky few that may take those routes are likely to wander to the forest edges along the way.
    • Worse, the corridors may not lead to viable forests in reserves such as Sunderbans, bounded by the sea and villages.

    Way ahead

    • Artificially boosting the prey base in a reserve is often an intuitive solution but it can be counter-productive.
    • To harness the umbrella effect of tigers for biodiversity conservation, it is more beneficial to increase areas occupied by tigers.
    • For many, the prescription is to create safe connectivity among forests and allow tigers to disperse safely to new areas.

    Try this PYQ from CSP 2020:

    Q.Among the following Tiger Reserves, which one has the largest area under “Critical Tiger Habitat” ?

    (a) Corbett

    (b) Ranthambore

    (c) Nagarjunasagar- Srisailam

    (d) Sunderbans

     

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  • Plastic waste Management

    Context

    The UN Environment Assembly meeting in February-March 2022 may finalise a way forward for global cooperation on the emissions of plastic waste into the aquatic ecosystems.

    Plastic as a consumption externality

    • Plastics represent an example of a consumption externality, which involves many people, rather than a production externality, which involves one or multiple firms.
    • Why is it challenging to address? Consumption externality is more challenging to address, as it is difficult to differentiate the behaviour of consumers.

    2 Approaches and issues with them

    • Imposing the cost of the harm on all consumers may not yield efficient solutions.
    • As the number of consumers is high, the cost of controlling them is also high.
    • 1] Banning plastic: This approach promotes a sustainable environment, intergenerational equity, saves marine and wildlife ecosystems, and restores soil quality.
    • But it also causes inconvenience for consumers, increases substitution cost, and creates unemployment shocks as it affects the production of plastics, leading to less economic activity, less income generation and finally less employment.
    • 2] Tax on plastic: Other key aspects that may be considered for global cooperation are the options if plastics are banned, the effectiveness of imposing tax and the potential problems with both these approaches.
    • It is difficult to identify the exact tax to be imposed, which may depend on country-specific circumstances.

    Way forward

    1] Command and control approach

    • The environment regulation for plastics may include a ‘command and control’ approach, and fiscal reforms like eco-taxes or subsidies.
    • The efficiency of such a regulation depends on its architecture — how well it is planned, designed and executed. It should be credible, transparent and predictable.

    2] Fiscal reforms like eco-taxes or subsidies

    • Eco-taxes may be imposed in the various stages of production, consumption or disposal of plastics.
    • Pollution due to plastics may happen during the production stage.
    • That is the logic for imposing tax on polluting inputs, as it forces the producer to look for cleaner substitutes.
    • Pollution also occurs during the consumption stage, and thus an eco-tax is recommended to discourage consumption.

    3] Estimating the social cost at the local and global level

    • Social cost should be evaluated differently in the local/regional and global contexts.
    • While health and hygiene are predominant considerations in the former case, climate change is the predominant consideration in the latter.
    • Ideally, eco-tax rates on plastics ought to be equal to the marginal social cost arising from the negative externality associated with production, consumption or disposal of goods and services.

    Comprehensive policy measures

    • Comprehensive policy measures against plastics may generally involve three complementary activities:
    • 1] The removal of existing taxes and subsidies that have a negative environmental impact.
    • 2] Taking into account the different types or grades of plastics.
    • 3] Restructuring existing taxes in an environmentally friendly manner.
    • Other suggestions include: Promoting multiple use of plastics through better waste management,
    • Educating the public on the harmful use of plastics,
    • Providing subsidy for research and development activity for substitute development.
    • Appropriate disposal mechanisms and waste management and use of waste for constructive usage like roads.

    Conclusion

    The key aspects that may be considered for global cooperation are the options if plastics are banned, the effectiveness of imposing tax and the potential problems with both these approaches.

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  • Species in news: Dugong

    India’s first Dugong conservation reserve will be built in Tamil Nadu for the conservation of Dugong, a marine mammal.

    Dugong Conservation Reserve

    • The reserve will spread over an area of 500 km in Palk Bay on the southeast coast of Tamil Nadu.
    • Palk Bay is a semi-enclosed shallow water body with a water depth maximum of 13 meters.
    • Located between India and Sri Lanka along the Tamil Nadu coast, the dugong is a flagship species in the region.

    Dugong: The sea cow

    • Dugong or the sea cow is the State animal of Andaman & Nicobar Islands.
    • This endangered marine species survive on seagrass and other aquatic vegetation found in the area.
    • It is the only herbivorous mammal that is strictly marine and is the only extant species in the family Dugongidae.
    • Dugongs are usually about three-meter long and weigh about 400 kg.
    • Dugongs have an expanded head and trunk-like upper lip.
    • Elephants are considered to be their closest relatives. However, unlike dolphins and other cetaceans, sea cows have two nostrils and no dorsal fin.

    Their habitat

    • Distributed in shallow tropical waters in the Indo-Pacific region, in India, they are found in the Gulf of Kutch, Gulf of Mannar, Palk Bay, and Andaman & Nicobar Islands.
    • Dugongs are long-living animals, that have a low reproductive rate, long generation time, and high investment in each offspring.
    • The female dugongs do not bear their first calf until they are at least 10 and up to 17 years old.
    • A dugong population is unlikely to increase more than 5% per year. They take a long time to recover due to the slow breeding rate.

    Causes of extinction

    • Having being declared vulnerable, the marine animal calls for conserving efforts.
    • Studies have suggested the reasons for the extinction of the animal such as slow breeding rate, fishing, and the loss of habitat.
    • They are also known to suffer due to accidental entanglement and drowning in gill-nets.

    Conservation in India

    • The conservation reserve can promote growth and save vulnerable species from the verge of extinction.
    • Dugongs are protected in India under Schedule 1 of the Indian Wildlife Act 1972 which bans the killing and purchasing of dugong meat.
    • IUCN status: Vulnerable

    Try answering this PYQ:

    Q. With reference to ‘dugong’, a mammal found in India, which of the following statements is/are correct?

    1. It is a herbivorous marine animal.
    2. It is found along the entire coast of India.
    3. It is given legal protection under Schedule I of the Wildlife (Protection) Act, 1974.

    Select the correct answer using the code given below:

    (a) 1 and 2 only

    (b) 2 only

    (c) 1 and 3 only

    (d) 3 only

     

     

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  • EV Battery Swapping Policy

    NITI Aayog is holding a consultation on the upcoming electric vehicle (EV) battery swapping policy.

    What is BaaS?

    • Battery-as-a-service (BaaS) is seen as a viable charging alternative.
    • Manufacturers can sell EVs in two forms: Vehicles with fixed or removable batteries and vehicles with batteries on lease.
    • If you buy an electric scooter with battery leasing, you do not pay for the cost of the battery—that makes the initial acquisition almost 40% cheaper.
    • Users can swap drained batteries for a fully charged one at a swap station. The depleted batteries are then charged on or off-site.
    • The advantages of swapping include low downtimes for commercial fleets, reduced space requirements, and lower upfront costs.
    • It is also a viable solution for those who don’t have parking spots at home.

    What is battery interoperability?

    • That’s when a battery is compatible across vehicles and chargers, so you can seamlessly swap a battery at any swap station. This can help achieve scale.
    • However, manufacturer and service providers say there are safety concerns around the ‘one-size-fits-all’ model and caution too much standardization can kill innovation.

    Why hasn’t BaaS taken off yet?

    • There are economic and operational constraints.
    • Energy service providers offering swapping solutions have to charge 18% goods and services tax (GST) for swapping, compared to 5% GST on the purchase of an EV.
    • Additionally, the government’s FAME-II incentives are not offered to vehicles sold with BaaS or swap station operators.
    • While these are economic disadvantages compared to direct charging solutions, the lack of a dense and interoperable battery swap infrastructure has also hindered the roll-out.
    • Manufacturers, on the other hand, are keen to create proprietary battery and charging systems.

    Issues with BaaS

    • There is a need for standardization of safety specifications  as well as  the battery.
    • Swapping in the various permutations and combinations of batteries at a station  where  they  have not been tested for compatibility could lead to safety hazards.
    • Also, mandating only one type of battery to  be eligible for  concessions  would be  disadvantageous  to  many  players.

    Who offers BaaS in India?

    • Bengaluru-based startup Bounce is the first e-two-wheeler maker to sell its scooters with BaaS, and claims to have achieved a million battery swaps.
    • Others like Ola Electric and Ather have stuck to direct charging solutions, while Hero Electric offers both fixed and removable batteries.
    • Many makers are working with energy service providers to offer battery swapping.
    • The global precedent is a mixed bag: Ample, which offers swaps in the US, has found success with commercial fleets, while most personal users charge at home.

    Why is Battery Swapping needed?

    • High Cost of EVs: An EV, by industry standards, is 1.5-2x costlier than IC Engine counterpart and at least half the cost is from the battery pack.
    • Cost reduction: Many manufacturers are offering batteries separately from a vehicle, reducing the cost. In that case, a fleet owner can buy vehicles without battery and utilize battery swapping.
    • Range Anxiety: Another major reason stopping people from buying EVs is range anxiety, or in simple terms, the fear of battery getting empty without finding a charging station.
    • Inadequate charging infrastructure: Unlike petrol pumps, EV charging stations are rare to spot and that further increases the range anxiety exponentially, especially while going on a road trip.
    • Hazard management: In case of a Swapping Station, one can simply locate a station, go and replace the empty battery with a new one.

     

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  • Green Hydrogen Policy

     

    The Ministry of Power has notified the first part of the National Hydrogen Mission policy on green hydrogen and green ammonia, aimed to boost production of hydrogen and ammonia using renewable energy.

    What is green hydrogen?

    • Green hydrogen is hydrogen gas produced through electrolysis of water.
    • It is an energy intensive process for splitting water into hydrogen and oxygen— using renewable power to achieve this.

    Key takeaways of the Green Hydrogen Policy

    • The new policy offers 25 years of free power transmission for any new renewable energy plants set up to supply power for green hydrogen production before July 2025.
    • This means that a green hydrogen producer will be able to set up a solar power plant in Rajasthan to supply renewable energy to a green hydrogen plant in Assam.
    • It would not be required to pay any inter-state transmission charges.

    What are the incentives?

    • The government is set to provide a single portal for all clearances required for setting up green hydrogen production.
    • It will facilitate producers to transfer any surplus renewable energy generated with discoms for upto 30 days and use it as required.
    • The requirement of time bound clearances for these projects would spur investment while grid connectivity on priority will ease operational processes.
    • The energy plants set up to produce green hydrogen/ammonia would be given connectivity to the grid on a priority basis.
    • State DISCOMS may also procure renewable energy to supply green hydrogen producers but will be required to do so at a concessional rate.
    • Such procurement would also count towards a state’s Renewable Purchase Obligation (RPO) under which it is required to procure a certain proportion of its requirements from renewable energy sources.

    Facilities to boost export

    • Under the policy port authorities will also provide land at applicable charges to green hydrogen and green ammonia producers to set up bunkers near ports for storage prior to export.
    • Germany and Japan could be key markets for green hydrogen produced in India.

    Why such move?

    • The move is likely going to make it more economical for key users of hydrogen and ammonia such as the oil refining, fertiliser and steel sectors to produce green hydrogen for their own use.
    • These sectors currently use grey hydrogen or grey ammonia produced using natural gas or naphtha.

     

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