đŸ’„Join UPSC 2027,2028 Mentorship (July Batch) + XFactor Notes & Microthemes PDF
Talk to Mentor

Civilsdaily

Login

Subject: Environment

  • Radioactive Pollution in Water

    Radioactive pollution of water is newly emerging but is of grave concern for water pollution and human health.

    Quick recap: Radioactivity

    • Radioactivity is the phenomenon of spontaneous emission of particles or waves from the unstable nuclei of some elements.
    • There are three types of radioactive emissions: Alpha, Beta and Gamma.
    • Alpha particles are positively charged He atoms, beta particles are negatively charged electrons and gamma rays are neutral electromagnetic radiations.
    • Radioactive elements are naturally found in the earth’s crust.

    Radioactive contamination of Water

    • Natural: Percolation of naturally occurring radioactive materials (NORM) from the soil sediments to the aquifer causes groundwater contamination.
    • Man-made: Anthropogenic sources of such pollution include- nuclear weapon investigation, nuclear calamities, nuclear powerhouses and dumping of radioactive waste.

    Various contaminant elements

    • Uranium, thorium and actinium are three NORM series that contaminate water resources.
    • A number of radionuclides are found in surface and subsurface waters, among which 3H, 14C, 40K, 210Pb, 210Po, 222Rn, 226Ra, 228Ra, 232Th and 234,235,238U are common.
    • Strontium-90, Caesium-137, etc are also formed by nuclear reactors, along with numerous unnecessary radioisotopes wastes.
    • 40K and 7Be are the most commonly found radioactive elements in the sludge generated in sewage treatment plants.
    • Nuclear reactors produce radioisotopes (Cobalt-60, Iridium-192, etc) that hand out as sources of gamma radiation in radiotherapy and numerous industrial appliances.

    Oceanic sources

    • Oceans and seas are the natural repositories of naturally occurring uranium. It is found in the form of uranyl carbonate ion.
    • A significant concentration of uranium is supposed to be found in the greater salinity of the marine water.
    • 40K (Radioactive Potassium) is also found in considerable concentration in the marine environment.

    Measuring radioactive pollution

    • Radioactivity is measured in Becquerel (SI unit) or in Curie.
    • Energy absorbed per unit mass is measured by Gray, while the unit Sievert measures the quantity of radiation absorbed by human tissues.
    • A small amount of radiation is found in all types of water but the extended amount of radiation is harmful to human health.
    • Radioactivity in drinking water can be determined by a gross alpha test.

    Hazards of such pollution

    • Radioactive elements have an effect on the environment and can cause a risk to human healthiness if inhaled, injected or exposed.
    • Human tissues absorb radiation through polluted water and foodstuff, which can cause serious health risks.
    • High doses of radiation can cause acute radiation syndrome or cutaneous radiation injury.
    • Exposure to radiation causes various disorders in human physiology, including cancer, leukaemia, genetic mutations, osteonecrosis, cataracts and chromosomal disruption.

     

    UPSC 2022 countdown has begun! Get your personal guidance plan now! (Click here)

  • Ambergris: The Floating Gold

    The Crime Branch in Pune and seized 550 grams of ambergris, also known as ‘floating gold’.

    What is Ambergris?

    • Ambergris, which means gray amber in French, is a waxy substance that originates from the digestive system of the protected sperm whales.
    • It is incorrectly referred to as ‘whale vomit’.
    • It is produced in the gastrointestinal tract of some of the sperm whales for the passage of hard, sharp objects that are ingested when the whale eats large quantities of marine animals.

    Why is it so expensive?

    • Investigating agencies from across India who have seized ambergris in the recent past estimate its value to be somewhere between Rs 1 to 2 crores per kilogram, depending on the purity and quality.
    • Being extremely rare contributes to its high demand and high price in the international market.

    Its uses

    • Traditionally, ambergris is used to produce perfumes that have notes of musk.
    • While there are records of it being used to flavor food, alcoholic beverages and tobacco in some cultures in the past, it is rarely used for these purposes presently.

    Legalities and recent cases of seizure in India

    • While there is a ban on possession and trade of ambergris in countries like the USA, Australia and India, in several other countries it is a tradable commodity.
    • In the Indian context, the sperm whales are a protected species under Schedule 2 of the Wildlife Protection Act, 1972 and possession or trade of any of its by-products, including Ambergris is illegal.
    • It has been observed that the gangs smuggling the ambergris procure it from coastal areas and ship it to destination countries via some other countries with whom India has comparatively less stringent sea trade.

     

    UPSC 2022 countdown has begun! Get your personal guidance plan now! (Click here)

  • To check stubble burning, monitor policy implementation

    Context

    Every October and November, parts of north India are engulfed by a dense fog. Farmers resort to the practice due to the limited time they have between the harvesting of kharif paddy and sowing of the rabi wheat.

    Government initiatives to stop the stubble burning

    • Policy measures: In 2014, the Ministry of Agriculture and Farmers Welfare developed a National Policy for the Management of Crop Residue.
    • Ban by NGT: In 2015, the National Green Tribunal banned stubble burning in Rajasthan, Uttar Pradesh, Delhi, Haryana and Punjab.
    • Weak enforcement: The enforcement of the ban has, however, been weak, largely due to inadequate political will.
    • Legal measures: Stubble burning was considered an offence under Section 188 of the Indian Penal Code and in the Air and Pollution Control Act, 1981.
    • However, it has now been decriminalised as per a recent government announcement.
    • The Central Scheme on Promotion of Agricultural Mechanisation for In-Situ Management of Crop Residue was introduced in 2018-19.
    • Over 1.5 lakh crop residue management machineries have been supplied to farmers and custom hiring centres between 2018-19 to 2020-21.

    How successful were the measures?

    • As a result of these efforts, the number of crop residue burning events declined from 2016 to 2019.
    • This year satellite data did show an almost 50 per cent decline in the number of stubble burning events in Punjab, Haryana and UP in October.
    • However, after including burning events till November 21, the decline reduced to about 8 per cent.
    • Experts suggest that the respite in October was temporary as the initial decline can be attributed to the delayed withdrawal of monsoon.
    • It is thus evident that despite various government initiatives, substantial stubble burning continues in several states.

    Suggestions

    • Subsidise operational cost for crop residue management: To ease farmers’ financial burden, the government could consider subsidising operational costs along with providing farmers capital subsidy on crop residue management equipment.
    • Ex-situ management of crop residue: Ex-situ management of crop residue can also be explored under the schemes covering products such as bales and pellets for biomass power generation and supplementary feedstock in coal-fired power plants.
    • Awareness generation: Awareness generation and trust building exercises should be undertaken with the support of local civil society organisations.
    • Adopt targeted and cluster-based approach: Stubble burning is fairly concentrated in regions within states.
    • A targeted and cluster-based approach can be undertaken by identifying districts with a higher number of stubble burning incidents.
    • Central and state government interventions can then be concentrated in these districts.
    • Monitoring system at local level: To make these interventions effective, there is a requirement for formulating a robust monitoring system at the local level to track the progress of different activities.

    Consider the question “Stubble burning by farmers of the adjacent states contributes significantly to the air pollution in Delhi. In this context, examine the initiatives taken by the government to deal with the problem and suggest the way forward.”

    Conclusion

    Dealing with the practice of stubble burning requires efforts on multiple levels. A combination of these measures can complement the existing initiatives to encourage farmers to adopt zero stubble burning practices.

    UPSC 2022 countdown has begun! Get your personal guidance plan now! (Click here)

  • Kasturirangan Committee Recommendations for Western Ghats Conservation

    Recently, the Karnataka CM has informed the Centre that the state is opposed to the Kasturirangan Committee report on the Western Ghats.

    What is the issue?

    • The Kasturirangan committee report proposes 37 per cent of the total area of Western Ghats, which is roughly 60,000 square kilometers, to be declared as eco-sensitive area (ESA).
    • Declaring this would adversely affect the livelihood of people in the region, asserted the Karnataka CM.

    Kasturirangan Committee Report

    • The Western Ghats Ecology Expert Panel (WGEEP), also known as the Gadgil Commission after its chairman Madhav Gadgil, was an environmental research commission.
    • It was appointed by the Ministry of Environment and Forests of India. The commission submitted the report in 2011.
    • The WGEEP was succeeded by an eminent scientist K. Kasturirangan.

    Key recommendations

    (1) Declaration of Eco-Sensitive Area (ESA)

    • The committee report proposes 37 per cent of the total area of Western Ghats, which is roughly 60,000 square km, to be declared as eco-sensitive area (ESA).
    • Out of this, 20,668 sq km of the area falls in Karnataka (46.50%) covering 1,576 villages.

    (2) Ban on various activities

    • The report recommended a blanket ban on mining, quarrying, setting up of red category industries and thermal power projects.
    • It also stated that the impact of infrastructural projects on the forest and wildlife should be studied before permission is given for these activities.

    (3) Urging of UNESCO World Heritage tag

    • It has sought for UNESCO Heritage tag as an opportunity to build global and domestic recognition of the enormous natural wealth that exists in the Western Ghats.
    • The 39 sites are located across the Western Ghats and distributed across the states (Kerala 19), Karnataka (10), Tamil Nadu (6) and Maharashtra (4).

    Reasons behind rejection by Karnataka

    • Hitherto conservation measures: Karnataka has the distinction of being one of the states with extensive forest cover and the government has taken care to protect the biodiversity of Western Ghats.
    • Curb over development activities: The state believes that implementation of the report will halt the developmental activities in the region.
    • Issues over satellite observations: The Kasturirangan report has been prepared based on the satellite images, but the ground reality is different.
    • Adaptation by People: People of the region have adopted agriculture and horticultural activities in an eco-friendly manner.

    Significance of the recommendations

    • There have been massive encroachments across the state forest areas and these have been done at the behest of political leaders.
    • We are in the throes of extreme climate events, which are impacting nature and people.
    • Hence it is prudent to conserve the fragile ecosystems as it costs less compared to the situation prone to calamities (with changes in the climate).

     

    UPSC 2022 countdown has begun! Get your personal guidance plan now! (Click here)

  • Species in news: Physella Acuta

    A tiny snail with a striking, pellucid golden-yellow shell found in the Edappally canal in Kochi has been flagged as an invasive species that could play havoc with native ecosystems.

    Snail Physella Acuta

    • First described by J.P.R. Draparnaud in 1805, Physella acuta is considered native to North America but is now found in all continents except Antarctica.
    • The snail was first reported in India in the early 1990s.
    • It is believed to have reached Kerala through the aquarium trade, a major vector for invasive species.
    • In Kerala, the snail had made its home in a highly polluted reach plagued by high sedimentation, untreated sewage, commercial effluents, construction wastes and a thick growth of invasive aquatic weeds.

    Threats posed

    • This snail plays host to worms that can cause food-borne diseases and skin itches in humans.
    • Moreover, its rapid growth rate, air-breathing capability, and tolerance to pollution make it a potential competitor to native fauna.

     

    UPSC 2022 countdown has begun! Get your personal guidance plan now! (Click here)

  • Centre and states must work together to tackle the pollution in the NCR

    Context

    Supreme Court (SC) judges have pulled up the Delhi and central governments for not doing enough to correct the dire air quality situation. They also remarked on what message we are sending to the world.

    The pollution problem raises doubt about the quality of urbanisation in India

    •  If one looks at the capitals of G20 countries, Delhi’s air quality index (AQI) during November 1-15, is by far the worst at 312, as per World Air Quality Index Project.
    •  India’s distinction goes beyond Delhi.
    • As per the World Air Quality Report of 2020, prepared by IQAir (a Swiss organisation), of the 30 most polluted cities in the world, 22 are in India.
    • The problem is much deeper, raising doubts about the quality of our urbanisation.

    Contributing sources and their share

    • Contributing sources: As per the report of the Ministry of Environment, Forest, and Climate Change submitted to the UN Framework Convention on Climate Change following sources contribute in the given proportion:
    • Energy generation (largely coal-based thermal power) is the biggest culprit with a share of 44 per cent in greenhouse gas emissions,
    • Energy generation is followed by manufacturing and construction-18 per cent.
    • Agriculture-14 per cent.
    • Transport-13 per cent industrial processes and product use- 8 per cent and waste burning- 3 per cent.

    Suggestions to tackle Delhi’s pollution

    • As per the System of Air Quality Forecasting and Research (SAFAR), the reasons for poor AQI differ day to day.
    • On a particular day, say November 7, stubble burning contributed 48 per cent of Delhi’s air pollution, which fell to just 2 per cent on November 18.
    • Reduce rice cultivation: The Centre needs to sit down with neighbouring states and come up with a plan to reduce the rice area in this belt, which is already depleting the water table, creating methane and nitrous oxide, to incentivise farmers to switch to other crops through better returns than in rice cultivation.
    • Adopt EVs: To tackle vehicular pollution, we need a massive drive towards electric vehicles (EVs), and later towards green hydrogen when it becomes competitive with fossil fuels.
    • Charging stations: Scaling up EVs quickly demands creating charging stations on a war footing.
    • Develop carbon sink: Delhi also needs a good carbon sink.
    • Rejuvenating the Ridge area with dense forests and developing thick forests on both sides of the Yamuna may help.

    Enhancing farmers income through solar farming

    •  The Prime Minister has done a commendable job in Glasgow to commit that 50 per cent of India’s energy will be from renewable sources by 2030.
    • To replace coal in energy generation, solar and wind is the way to go at the all-India level.
    • The current model in solar energy is heavily tilted towards companies.
    • They are setting up large solar farms on degraded or less fertile lands.
    • We can supplement that model by developing solar farms on farmers’ fields.
    • This would require solar panels to be fixed at a 10 feet height with due spacing to let enough sunlight come to the plants for photosynthesis.
    • These “solar trees” can then become the “third crop” for the farmers, earning them regular income throughout the year, provided the law allows them to sell this power to the national grid.
    • The Delhi government’s pilot in Ujwa KVK land on these lines showed that farmers can earn up to Rs 1 lakh per acre per year from this “solar farming”.
    • This is on top of the two crops they can keep growing under those solar trees.
    • This will double farmers’ income within a year.

    Conclusion

    As deteriorating air quality grips the whole country, we need to work on multiple levels with coordination to tackle the problem.

    UPSC 2022 countdown has begun! Get your personal guidance plan now! (Click here)

  • [pib] Project RE-HAB

    Buoyed by the success of its innovative Project RE-HAB (Reducing Elephant-Human Attacks using Bees) in Karnataka, Khadi and Village Industries Commission (KVIC) has now replicated the project in Assam.

    Project RE-HAB

    • Project RE-HAB is a sub-mission of KVIC’s National Honey Mission.
    • Under the project, “Bee-fences” are created by setting up bee boxes in the passageways of elephants to block their entrance to human territories.
    • The boxes are connected with a string so that when elephants attempt to pass through, a tug or pull causes the bees to swarm the elephant herds and dissuade them from progressing further.
    • It is a cost-effective way of reducing human-wild conflicts without causing any harm to the animals.

    How does it work?

    • It is scientifically recorded that elephants are annoyed by the honey bees.
    • Elephants also fear that the bee swarms can bite the sensitive inner side of the trunk and eyes.
    • The collective buzz of the bees is annoying to elephants that force them to return.

     

    UPSC 2022 countdown has begun! Get your personal guidance plan now! (Click here)

  • Species in news: Lesser Florican

    In a major discovery, the longest in-country migration route of lesser floricans, the endangered birds of the bustard group, has been tracked for the first time from Rajasthan to Maharashtra’s Ahmednagar district.

    Lesser Florican

    • The lesser florican (Sypheotides indicus), also known as the likh or kharmore, is the smallest in the bustard family.
    • It is endemic to the Indian Subcontinent where it is found in tall grasslands and is best known for the leaping breeding displays made by the males during the monsoon season.
    • The male has a contrasting black and white breeding plumage and distinctive elongated head feathers that extend behind the neck.
    • These bustards are found mainly in northwestern and central India during the summer but are found more widely distributed across India in winter.
    • The only similar species is the Bengal florican (Houbarobsis bengalensis) which is larger and lacks the white throat, collar and elongated plumes.

    Conservation status

    • The Lesser Florican is protected under Schedule 1 of the Wildlife (Protection) Act, 1972, Lesser Florican
    • The bird is listed as “Critically Endangered” on the International Union for Conservation of Nature’s Red List of Threatened Species.

    Threats

    • It is threatened both by hunting and habitat degradation.
    • The species is highly endangered and has been officially hunted to extinction in some parts of its range such as Pakistan.

    Try this PYQ:

    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

     

    [wpdiscuz-feedback id=”ken5zilctv” question=”Please leave a feedback on this” opened=”1″]Post your answers here.[/wpdiscuz-feedback]

     

    UPSC 2022 countdown has begun! Get your personal guidance plan now! (Click here)

  • Perform, Achieve and Trade (PAT) Scheme

    A recent report by the Centre for Science and Environment (CSE) has attributed the inefficiency of the PAT scheme to non-transparency, loose targets and overlooked deadlines.

    PAT Scheme

    • Perform Achieve and Trade (PAT) scheme is a flagship program of Bureau of Energy Efficiency under the National Mission for Enhanced Energy Efficiency (NMEEE).
    • NMEEE is one of the eight national missions under the National Action Plan on Climate Change (NAPCC) launched by the Government of India in the year 2008

    Working of the scheme

    • PAT is a market-based compliance mechanism to accelerate improvements in energy efficiency in energy-intensive industries.
    • The energy savings achieved by notified industries is converted into tradable instruments called Energy Saving Certificates (ESCerts).
    • The ESCerts after issuance by the Bureau of Energy Efficiency are traded at Power Exchanges.

    What is PAT cycle?

    • The government shortlists industries and restricts the amount of energy they can consume and defines a time limit of three years by when this restriction should be met as part of PAT.
    • These three years of time are called one PAT cycle.
    • The industries are chosen after in-depth, sector-wise analysis by the government.
    • Industries that participate in this scheme are called designated consumers (DC).
    • Those that overachieve their targets are issued energy savings certificates (ESCerts) that can be traded with industries that have not achieved their targets.
    • Non-achievers have to buy the ESCerts after the three years for compliance.

    Various PAT cycles

    • PAT covered about 13 energy-intensive sectors
    • Sectors included are thermal power plants (TPP), cement, aluminium, iron and steel, pulp and paper, fertilizer, chlor-alkali, petroleum refineries, petrochemicals, distribution companies, railways, textile and commercial buildings (hotels and airports)
    • Announcements for six cycles since 2012 have been made so far

     

    UPSC 2022 countdown has begun! Get your personal guidance plan now! (Click here)

  • Emission caused by Nuclear Energy

    Supporters of the Nuclear Energy source say that it is a climate-friendly way to generate electricity. However, this is subjected to various considerations often not discussed.

    Why focus on Nuclear Energy?

    • The main factors for its choice were reliability and security of supply.
    • The latest figures on global carbon dioxide emissions call into question the world’s efforts to tackle the climate crisis.

    Soaring CO2 emissions

    • CO2 emissions are set to soar 4.9% in 2021, compared with the previous year, according to a study published earlier this month by the Global Carbon Project (GCP), a group of scientists that track emissions.
    • In 2020, emissions dropped 5.4% due to the COVID-19 pandemic and associated lockdowns.
    • The energy sector continues to be the largest emitter of greenhouse gases, with a share of 40% — and rising.

    Is nuclear power a zero-emissions energy source?

    No. Nuclear energy is also responsible for greenhouse gas emissions.

    • Uranium mining: Uranium extraction, transport and processing produces emissions.
    • Construction of power plants: The long and complex construction process of nuclear power plants also releases CO2, as does the demolition of decommissioned sites.
    • Nuclear waste and its transportation: This also has to be transported and stored under strict conditions — here, too, emissions must be taken into account.
    • Water consumption: Power plants depend on nearby water sources to cool their reactors, and with many rivers drying up, those sources of water are no longer guaranteed.

    How much CO2 does nuclear power produce?

    • Results vary significantly, depending on whether we only consider the process of electricity generation, or take into account the entire life cycle of a nuclear power plant.
    • A report released in 2014 by the IPCC estimated a range of 3.7 to 110 grams of CO2 equivalent per kilowatt-hour (kWh).
    • It’s long been assumed that nuclear plants generate an average of 66 grams of CO2/kWh.

    How climate-friendly is nuclear compared to other energies?

    • If the entire life cycle, nuclear energy certainly comes out ahead of fossil fuels like coal or natural gas.
    • But the picture is drastically different when compared with renewable energy.
    • Nuclear power releases 3.5 times more CO2 per kilowatt-hour than photovoltaic solar panel systems.
    • Compared with onshore wind power, that figure jumps to 13 times more CO2.
    • When up against electricity from hydropower installations, nuclear generates 29 times more carbon.

    Can we rely on nuclear energy to help stop global warming?

    • Around the world, nuclear energy representatives, as well as some politicians, have called for the expansion of atomic power.
    • Other countries have also supported plans to build new nuclear plants, arguing that the energy sector will be even more damaging for the climate without it.

    Feasibility of Nuclear Energy

    • High cost of construction: Due to the high costs associated with nuclear energy, it also blocks important financial resources that could instead be used to develop renewable energy.
    • Renewables are better: Those renewables would provide more energy that is both faster and cheaper than nuclear.
    • High water consumption: During the world’s increasingly hot summers, several nuclear power plants have already had to be temporarily shut down due to water scarcity.

    Conclusion

    • Taking into account the current overall energy system, nuclear energy is by no means CO2 neutral.
    • The contribution of nuclear energy is viewed too optimistically.
    • In reality construction, times are too long and the costs too high to have a noticeable effect on climate change. It takes too long for nuclear energy to become available.

     

    UPSC 2022 countdown has begun! Get your personal guidance plan now! (Click here)