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Subject: Environment

  • Take remedial action against WTE plants: NGT

    National Green Tribunal has directed Central Pollution Control Board (CPCB) and Delhi Pollution Control Committee (DPCC) to take remedial action against the three waste-to-energy plants in Ghazipur, Okhla and Narela-Bawana.

    Waste to Energy:

    • Waste to Energy or Waste to Power is the process of generating energy in the form of electricity and heat from the primary treatment of waste.

    Methods for waste to Power generation:

    1. Thermal technologies:

    • Incineration:
      • It is the most common and popular method for waste to energy generation.
      • The organics from the waste collected are burnt at high temperatures.
    • Gasification: Produces combustible gas, hydrogen, synthetic fuels
    • Thermal depolymerization: Produces synthetic crude oil, which can be further refined
    • Pyrolysis: Produces combustible tar/bio-oil and chars
    • Plasma arc gasification or plasma gasification process (PGP): Produces rich syngas including hydrogen and carbon monoxide usable for fuel cells or generating electricity to drive the plasma arch.

    2. Non-thermal technologies:

    • Anaerobic digestion: Biogas rich in methane
    • Fermentation production: Examples are ethanol, lactic acid, hydrogen
    • Mechanical biological treatment: Combines a sorting facility with a form of biological treatment such as composting.

    Advantages of WTE plants:

    • Decreases quantity of waste
    • Efficient waste management
    • Production of heat and power
    • Reduction of pollution
    • Incinerators have filters for trapping pollutants
    • Saves on transportation of waste
    • Provides better control over odour and noise
    • Prevents the production of methane gas

    Challenges for India:

    • Lack of general awareness on waste management
    • Unsegregated waste
    • High moisture content
    • Unorganized sector
    • High wear and tear of equipment due to foreign materials
    • Only electricity demand
    • Cycle Efficiency is low
    • Lack of enforcement of rules / regulations
    • Lack of Transparency in plant management
    • Lack of adequate waste disposal cost
    • Lack of customization of plant and machinery to suit Indian condition

  • Bustard Poaching in Pakistan

    The recent shooting of two Great Indian Bustards (GIBs) in Pakistan’s Cholistan desert has left wildlife activists in Rajasthan shocked and outraged.

    Great Indian Bustards

    • The GIB is one of the heaviest flying birds and can weigh up to 15 kg which grows up to one metre in height.
    • In July 2011, the bird was categorised as “critically endangered” by the International Union for Conservation of Nature (IUCN).
    • It is considered the flagship grassland species, representing the health of the grassland ecology.
    • For a long, conservationists have been demanding to secure this population, warning that the bird might get extinct in the coming decades.
    • It would become the first mega species to disappear from India after Cheetah in recent times.
    • Till the 1980s, about 1,500-2,000 Great Indian Bustards were spread throughout the western half of India, spanning eleven states.
    • However, with rampant hunting and declining grasslands, their population dwindled.

    Why in news?

    • The GIB, which is the state bird of Rajasthan, is considered India’s most critically endangered bird.
    • It is one of the most critically threatened species in India, with less than 150 birds left in the wild.

    Try this PYQ:

    Q.Which one of the following groups of animals belongs to the category of endangered species?

    (a) Great Indian Bustard, Musk Deer, Red Panda, Asiatic Wild Ass

    (b) Kashmir Stag, Cheetah, Blue Bull, Great Indian Bustard.

    (c) Snow Leopard, Swamp Deer, Rhesus Monkey, Saras (Crane)

    (d) Lion Tailed Macaque, Blue Bull, Hanuman Langur, Cheetah

  • La Soufriere volcanic eruption

    Sulphur dioxide (SO2) emissions from La Soufriere volcano eruption in the Caribbean have reached all the way to India.

    Why in news?

    • Its eruption has sparked fear of increased pollution levels in the northern parts of India and acid rain.
    • Volcanic plumes can cause aviation and air quality hazards.

    La Soufriere

    • It is an active stratovolcano on the Caribbean island of Saint Vincent in Saint Vincent and the Grenadines.
    • It is the highest peak in Saint Vincent and has had five recorded explosive eruptions since 1718.

    Impact of such eruptions

    • Volcanic emissions reaching the stratosphere can have a cooling effect on global temperatures.
    • The most significant climate impacts from volcanic injections into the stratosphere come from the conversion of sulphur dioxide to sulphuric acid, which condenses rapidly in the stratosphere to form fine sulphate aerosols.
    • The aerosols increase the reflection of radiation from the Sun back into space, cooling the Earth’s lower atmosphere or troposphere.

    Try this PYQ:

    Q.Which of the following adds/add carbon dioxide to the carbon cycle on the planet Earth?

    1. Volcanic action
    2. Respiration
    3. Photosynthesis
    4. Decay of organic matter

    Select the correct answer using the code given below:

    (a) 1 and 3 only

    (b) 2 only

    (c) 1, 2 and 4 only

    (d) 1, 2, 3 and 4

  • Indian Rhino Vision 2020

    The ambitious Indian Rhino Vision 2020 (IRV 2020) came to a close with the release of two rhinos — an adult male and a female — in Assam’s Manas National Park transported from Pobitora Wildlife Sanctuary about 185 km east.

    Try this PYQ:

    Q.Recently there was a proposal to translocate some of the lions from their natural habitat in Gujarat to which one of the following sites?

    (a) Corbett National Park

    (b) Kuno Palpur Wildlife Sanctuary

    (c) Mudumalai Wildlife Sanctuary

    (d) Sariska National Park

    What is IRV 2020?

    • In 2005, conservationists, alongside the Bodoland Territorial Council and the Government of Assam, came together to develop a long-term strategy to manage the species.
    • Their vision was ambitious; to build a 3,000-strong wild population of Greater one-horned rhinos by 2020, spread across seven sites in the state of Assam.
    • Thus the “Indian Rhino Vision 2020” (IRV2020) was born.

    Success of the IRV

    • Designed in 2005, the IRV2020 is believed to have achieved its target of attaining a population of 3,000 rhinos in Assam.
    • But the plan to spread the Rhinoceros unicornis across four protected areas beyond Kaziranga National Park, Orang National Park and Pobitora could not materialise.
    • Assam had at least five rhino-bearing areas till the 1980s.
    • Manas, in focus for the near-extinction of the pygmy hog, lost the World Heritage Site tag it received in 1985 along with Kaziranga from the UNESCO.
    • The translocated rhinos helped Manas National Park get back its World Heritage Site status in 2011.

  • Places in news: Thwaites Glacier

    The melting of Antarctica’s Thwaites Glacier – also called the “Doomsday Glacier”– has long been a cause of concern because of its high potential of speeding up the global sea-level rise happening due to climate change.

    Thwaites Glacier

    • Called the Thwaites Glacier, it is 120 km wide at its broadest, fast-moving, and melting fast over the years.
    • Because of its size (1.9 lakh square km), it contains enough water to raise the world sea level by more than half a meter.
    • Studies have found the amount of ice flowing out of it has nearly doubled over the past 30 years.
    • Thwaites’s melting already contributes 4% to global sea-level rise each year. It is estimated that it would collapse into the sea in 200-900 years.
    • Thwaites is important for Antarctica as it slows the ice behind it from freely flowing into the ocean. Because of the risk it faces — and poses — Thwaites is often called the Doomsday Glacier.

    What have previous studies said?

    • A 2019 study by New York University had discovered a fast-growing cavity in the glacier. Then last year, researchers detected warm water at a vital point below the glacier.
    • The study reported water at just two degrees above freezing point at Thwaites’s “grounding zone” or “grounding line”.
    • The grounding line is the place below a glacier at which the ice transitions between resting fully on bedrock and floating on the ocean as an ice shelf.
    • The location of the line is a pointer to the rate of retreat of a glacier.
    • When glaciers melt and lose weight, they float off the land where they used to be situated. When this happens, the grounding line retreats.
    • That exposes more of a glacier’s underside to seawater, increasing the melting rate resulting in the glacier speeding up, stretching out, and thinning, causing the grounding line to retreat ever further.

    What has the new study revealed?

    • The recent Gothenburg study used an uncrewed submarine to go under the Thwaites glacier front to make observations.
    • The submersible called “Ran” measured among other things the strength, temperature, salinity and oxygen content of the ocean currents that go under the glacier.
    • There is a deep connection to the east through which deepwater flows from Pine Island Bay, a connection that was previously thought to be blocked by an underwater ridge.

    Why this is a cause of worry?

    • The warm water is approaching the pinning points of the glacier from all sides, impacting these locations where the ice is connected to the seabed and where the ice sheet finds stability.
    • This has the potential to make things worse for Thwaites, whose ice shelf is already retreating.

  • Indus and Ganges river dolphins are two different species

    Detailed analysis of South Asian river dolphins has revealed that the Indus and Ganges River dolphins are not one, but two separate species.

    About Gangetic Dolphin

    • The Gangetic river system is home to a vast variety of aquatic life, including the Gangetic dolphin (Platanista gangetica).
    • It is one of five species of river dolphin found around the world.
    • It is found mainly in the Indian subcontinent, particularly in Ganga-Brahmaputra-Meghna and Karnaphuli-Sangu river systems.
    • An adult dolphin could weigh between 70 kg and 90 kg. The breeding season of the Gangetic dolphin extends from January to June.
    • They feed on several species of fishes, invertebrates etc.

    Indus Dolphin is the divergent specie

    • Currently, they are classified as two subspecies under Platanista gangetica. The study estimates that Indus and Ganges river dolphins may have diverged around 550,000 years ago.
    • The international team studied body growth, skull morphology, tooth counts, colouration and genetic makeup and published the findings last month in Marine Mammal Science.

    Conservation status

    • The Indus and Ganges River dolphins are both classified as ‘Endangered’ species by the International Union for Conservation of Nature (IUCN).
    • It is the national aquatic animal and had been granted non-human personhood status by the government in 2017.
    • It is also protected under Schedule I of the Wildlife Protection Act (1972).
    • Vikramshila Gangetic Dolphin Sanctuary (VGDS) in Bihar is India’s only sanctuary for the Gangetic dolphin.
    • It has been categorised as endangered on the Red List of Threatened Species by the IUCN
    • Physical barriers such as dams and barrages created across the river, the declining river flows reduced the gene flow to a great extent making the species vulnerable.

  • Deconstructing declarations of carbon-neutrality

    Against the global clamour for the declaration of carbon neutrality, India must consider several factors and their implications. The article highlights these factors.

    Countries declaring carbon-neutral
    targets

    • At the latest count by the non-profit Energy and Climate Intelligence Unit (ECIU), at the beginning of April, 32 countries had declared, in some documented form.
    • The impetus for such declarations arises from Article 4.1 of the Paris Agreement.
    • It is evident that the balance of emissions and removal of greenhouse gases is not sought on a country-wise basis but for the world as a whole.
    • Both developed country governments and civil society outfits commonly state this as an individual commitment by all countries.
    • The text of the Paris Agreement clearly indicates, based on considerations of equity and differentiation, that this is a global goal.

    2 critical and related issues

    • The first is the compatibility of the intent of Article 4.1 and Article 2.
    • 1) Is the achievement of carbon neutrality compatible with achieving the 1.5°C or 2°C goals?
    • And whether the mid-century carbon neutrality goals of developed countries are compatible with Article 2.2 of the Paris Agreement which focuses on equity and the principle of common but differentiated responsibilities.

    The current pledges fall short of achieving the targets

    • Three-way compatibility between temperature goals, carbon neutrality, and equity is not only not guaranteed, but cannot be achieved for the 1.5°C temperature goal at all.
    • Even for the 2°C goal, the current pledges are highly inadequate.
    • This conclusion is based on the global carbon budget.
    • According to the Intergovernmental Panel on Climate Change Special Report to restrict temperature rise less than 1.5° with 50% world can emit total 480 Giga-tonnes (billion tonnes) of carbon dioxide equivalent (GtCO2eq) from 2018 onwards.
    • At the current rate of emissions of about 42 GtCO2eq per year, this budget would be consumed in 12 years.
    • To keep within the 480 Gt budget, at a steady linear rate of decline, global carbon neutrality must be reached by 2039.
    • For a 50% probability of restricting temperature rise to below 2°C, the world can emit 1,400 GtCO2eq, that provides considerably greater room for manoeuvre.

    Emission of the U.S. and Europe

    • Emissions in the U.S. peaked in 2005 and have declined at an average rate of 1.1% from then till 2017.
    • Even if it did reach net-zero by 2050 at a steady linear rate of reduction, which is unprecedented, its cumulative emissions between 2018 and 2050 would be 106 GtCO2, which is 22% of the total remaining carbon budget for the whole world. [480 GtCO2 total]
    • This is so high that unless others reduced emissions at even faster rates, the world would most certainly cross 1.5°C warming.
    • Similarly, the European Union, to keep to its fair share of the remaining carbon budget would have to reach net-zero by 2033, with a constant annual reduction in emissions.
    • If the EU reaches net-zero only by 2050 it would consume at least 71 GtCO2, well above its fair share.
    • Regrettably, a section of the climate policy modelling literature has promoted the illusion that this three-way compatibility is feasible through speculative “negative emissions”
    • They have also been promoting the other illusion that not resorting to any serious emissions increase at all is the means to guarantee the successful development of the Third World.

    Why India should avoid net neutrality target

    • For one, India has to stay focused on development — both as its immediate need as well as its aspirational goal.
    • While sustainability is desirable, the question of how low India’s future low-carbon development can be is highly uncertain.
    • India’s current low carbon footprint is a consequence of the utter poverty and deprivation of a majority of its population, and not by virtue of sustainability.
    • Second, India does not owe a carbon debt to the world for excessive use in the past.
    • India’s emissions (not considering land use and land use change and forest-related emissions) are no more than 3.5% of global cumulative emissions prior to 1990 and about 5% since till 2018.
    • Any self-sacrificial declaration of carbon neutrality today in the current international scenario would be a wasted gesture reducing the burden of the developed world and transferring it to the backs of the Indian people.

    Consider the question “What are the factor India needs to consider about joining the global chorus on carbon neutrality targets.”

    Conclusion

    India’s approach to eventual net-zero emissions is contingent on deep first world emissions reductions and an adequate and unambiguous global carbon budget. Meanwhile, India must reject any attempt to restrict its options and be led into a low-development trap, based on pseudo-scientific narratives.

  • What is net-zero, and what are India’s objections?

    In its bid to reclaim the global climate leadership (stalled since Trump) the US is widely expected to commit itself to a net-zero emission target for 2050 at the virtual Climate Leaders’ Summit convened by Prez Joe Biden.

    Net-Zero Goal

    • Net-zero, which is also referred to as carbon-neutrality, does not mean that a country would bring down its emissions to zero.
    • Rather, net-zero is a state in which a country’s emissions are compensated by absorption and removal of greenhouse gases from the atmosphere.
    • Absorption of the emissions can be increased by creating more carbon sinks such as forests, while the removal of gases from the atmosphere requires futuristic technologies such as carbon capture and storage.
    • This way, it is even possible for a country to have negative emissions, if the absorption and removal exceed the actual emissions.
    • A good example is Bhutan which is often described as carbon-negative because it absorbs more than it emits.

    Try this PYQ from CSP 2016:

    Q.With reference to the Agreement at the UNFCCC Meeting in Paris in 2015, which of the following statements is/are correct?

    1. The Agreement was signed by all the member countries of the UN and it will go into effect in 2017.
    2. The Agreement aims to limit the greenhouse gas emissions so that the rise in average global temperature by the end of this century does not exceed 20C or even 1.50C above pre-industrial levels.
    3. Developed countries acknowledged their historical responsibility in global warming and committed to donate S 1000 billion a year from 2020 to help developing countries to cope with climate change.

    Select the correct answer using the code given below.

    (a)    1 and 3 only

    (b)    2 only

    (c)    2 and 3 only

    (d)    1, 2 and 3

    The global target

    • The goal of carbon neutrality is only the latest formulation of a discussion going on for decades, on having a long-term goal.
    • A very active campaign has been going on for the last two years to get every country to sign on to a net-zero goal for 2050.
    • It is being argued that global carbon neutrality by 2050 is the only way to achieve the Paris Agreement target of keeping the planet’s temperature from rising beyond 2°C compared to pre-industrial times.
    • Current policies and actions being taken to reduce emissions would not even be able to prevent a 3–4°C rise by the turn of the century.
    • Long-term targets ensure predictability, and continuity, in the policies and actions of the countries. But there has never been a consensus on what this goal should be.

    Going beyond emission reduction

    • Earlier, the discussions used to be on emission-reduction targets, for 2050 or 2070, for rich and developed countries.
    • These unregulated emissions over several decades are mainly responsible for global warming and consequent climate change.
    • The net-zero formulation does not assign any emission reduction targets to any country.
    • Theoretically, a country can become carbon-neutral at its current level of emissions, or even by increasing its emissions, if it is able to absorb or remove more.

    Global actions for net-zero

    • Several other countries, including the UK and France, have already enacted laws promising to achieve a net-zero emission scenario by the middle of the century.
    • The EU is working a similar Europe-wide law, while many other countries including Canada, South Korea, Japan and Germany have expressed their intention to commit themselves to a net-zero future.
    • Even China has promised to go net-zero by 2060.
    • India, the world’s third-biggest emitter of greenhouse gases, after the US and China, is the only major player holding out.

    India’s position is unique

    • India is the only one opposing this target because it is likely to be the most impacted by it.
    • Over the next two to three decades, India’s emissions are likely to grow at the fastest pace in the world, as it presses for higher growth to pull hundreds of millions of people out of poverty.
    • No amount of afforestation or reforestation would be able to compensate for the increased emissions.
    • Most of the carbon removal technologies right now are either unreliable or very expensive.

    Why does India object to net-zero emissions?

    • The net-zero goals do not figure in the 2015 Paris Agreement, the new global architecture to fight climate change.
    • The Paris Agreement only requires every signatory to take the best climate action it can.
    • Countries need to set five- or ten-year climate targets for themselves, and demonstrably show they have achieved them.
    • Implementation of the Paris Agreement has begun only this year.
    • Most of the countries have submitted targets for the 2025 or 2030 period.
    • India has been arguing that instead of opening up a parallel discussion on net-zero targets outside of the Paris Agreement framework, countries must focus on delivering on what they have already promised.

    India is already doing more

    • India is hoping to lead by example. It is well on its way to achieving its three targets under the Paris Agreement and looks likely to overachieve them.
    • Several studies have shown that India is the only G-20 country whose climate actions are compliant with the Paris Agreement goal of keeping global temperatures from rising beyond 2°C.
    • Even the actions of the EU, which is seen as the most progressive on climate change, and the US are assessed as “insufficient”.
    • In other words, India is already doing more, relatively speaking, on climate than many other countries.

    Fuss over developed countries contribution

    • New Delhi also repeatedly points to the fact that the developed nations have never delivered on their past promises and commitments.
    • No major country achieved the emission-cut targets assigned to them under the Kyoto Protocol, the climate regime preceding the Paris Agreement.
    • Some openly walked out of the Kyoto Protocol, without any consequences.
    • None of the countries has delivered on the promises they made for 2020.
    • Even worse is their track record on their commitment to providing money, and technology, to developing and poor countries to help them deal with the impacts of climate change.

    India’s way forward

    • India has been arguing that the 2050 carbon-neutrality promise might meet a similar fate, although some countries are now finding themselves in law.
    • It has been insisting that the developed countries should, instead, take more ambitious climate actions now, to compensate for the unfulfilled earlier promises.
    • At the same time, it has been saying that it does not rule out the possibility of achieving carbon neutrality by 2050 or 2060.
    • Just that, it does not want to make an international commitment so much in advance.

    Back2Basics: Paris Agreement

    • The Paris Agreement is a legally binding international treaty on climate change. It was adopted by 196 Parties at COP 21 in Paris, on 12 December 2015 and entered into force on 4 November 2016.
    • Its goal is to limit global warming to well below 2, preferably to 1.5 degrees Celsius, compared to pre-industrial levels.
    • To achieve this long-term temperature goal, countries aim to reach global peaking of greenhouse gas emissions as soon as possible to achieve a climate-neutral world by mid-century.
    • It is a landmark process because, for the first time, a binding agreement brings all nations into a common cause to undertake ambitious efforts to combat climate change and adapt to its effects.

    The action plan

    • Implementation of the Paris Agreement requires economic and social transformation, based on the best available science.
    • The Agreement works on a 5- year cycle of increasingly ambitious climate action carried out by countries.
    • By 2020, countries submit their plans for climate action known as nationally determined contributions (NDCs).

    [Burning Issue] Five Years of Paris Agreement

  • ‘Seechewal Model’ of wastewater management

    A new wastewater treatment plant opened recently in a village in Punjab’s Patiala district uses a unique method devised to treat, recycle and reuse wastewater.

    Seechewal Model

    • The plant in the village of Patiala aims to achieve the following objective using the ‘Seechewal Model’ of wastewater management:
    1. Recycling and reusing the treated wastewater for irrigation
    2. Preventing further contamination of groundwater
    • The model is a pipe-and-pump formula used to remove heavy solid particles, oil and other material from water.
    • It was introduced by Sant Balbir Singh Seechewal and was first used in Seechewal, Punjab.
    • The project aims to implement a combination of processes through four-well systems of wastewater treatment for reuse apart from human consumption.
    • The water wells need to be cleaned regularly; otherwise, they produce extremely poor effluents with high suspended solids, which can be detrimental to the constructed wetland and cause clogging of beds.
    • To ensure continuous and effective operation, the accumulated material must be emptied periodically.

    Benefits  offered

    • The project will reduce the usage of freshwater by providing an option of treated water to farmers. It will aim at water sustainability with appropriate technologies of water recycle-reuse-recharge.”
    • The project has engaged, empowered and evolved community sustained processes for water management and strengthened community collectives.

  • Mahendragiri Hills

    The Odisha government has proposed a second biosphere reserve in the southern part of the state at Mahendragiri, a hill ecosystem having a rich biodiversity.

    The 5,569-square kilometre Similipal Biosphere Reserve is Odisha’s first such reserve and was notified May 20, 1996.

    Mahendragiri Hills

    • Mahendragiri is a mountain in the Rayagada subdivision of the district of Gajapati, Odisha, India.
    • It is situated amongst the Eastern Ghats at an elevation of 1,501 metres.
    • The hill and its surrounding areas are recognized as a biodiversity hot spot due to numerous medicinal plants and other species that are found here.
    • Mahendragiri is inhabited by the Soura people, a particularly vulnerable tribal group as well as the Kandha tribe.

    Try this PYQ:

    Q.From the ecological point of view, which one of the following assumes importance in being a good link between the Eastern Ghats and the Western Ghats? (CSP 2018)

    (a) Sathyamangalam Tiger Reserve

    (b) Nallamala Forest

    (c) Nagarhole National Park

    (d) Seshachalam Biosphere Reserve

    Why designate it as a biosphere reserve?

    • The area of the proposed Mahendragiri Biosphere Reserve is around 470,955 hectares and is spread over Gajapati and Ganjam districts in the Eastern Ghats.
    • The hill ecosystem acts as a transitional zone between the flora and fauna of southern India and the Himalayas, making the region an ecological estuary of genetic diversities.
    • The rich flora in Mahendragiri represents 40 per cent of the reported flora of Odisha, with around 1,358 species of plants.

    Back2Basics:  Biosphere Reserves

    • A biosphere reserve is an area of land or water that is protected by law in order to support the conservation of ecosystems, as well as the sustainability of mankind’s impact on the environment.
    • Each reserve aims to help scientists and the environmental community figure out how to protect the world’s plant and animal species while dealing with a growing population and its resource needs.
    • To carry out the complementary activities of biodiversity conservation and sustainable use of natural resources, biosphere reserves are traditionally organized into 3 interrelated zones, known as:
      1. the core area
      2. the buffer zone and
      3. a transition zone or ‘area of cooperation