💥Mains Ready By December. Smash Mains & Smash PYQ Admissions Open
Talk to Mentor

Civilsdaily

Login

Subject: Environment

  • Species in news: Barn Owl

    With a thriving rat population playing havoc with its coconut yield, the UT of Lakshadweep hires barn owls for help.

    Try this PYQ:

    Q.The Red Data Books published by the International Union for Conservation of Nature and Natural Resources (IUCN) contains lists of:

    1. Endemic plant and animal species present in the biodiversity hotspots.
    2. Threatened plant and animal species.
    3. Protected sites for conservation of nature and natural resources in various countries.

    Select the correct answer using the codes given below:

    (a) 1 and 3

    (b) 2 only

    (c) 2 and 3

    (d) 3 only

    Barn Owl

    IUCN status: Least Concerned

    • The barn owl is the most widely distributed species of owl in the world and one of the most widespread of all species of birds.
    • It is found almost everywhere in the world except for the polar and desert regions, Asia north of the Himalayas, most of Indonesia, and some Pacific islands.

    What is Barn?

    • A barn is an agricultural building usually on farms and used for various purposes.
    • It refers to structures that house livestock, including cattle and horses, as well as equipment and fodder, and often grain.

  • What is the Hangenberg Crisis?

    The explosion of a nearby star — occurred at between Devonian and Carboniferous periods — could have caused a mass extinction event that took place 359 million years ago.

    Try this question from CSP 2018:

    Q.The term “sixth mass extinction/sixth extinction” is often mentioned in the news in the context of the discussion of

    (a) Widespread monoculture Practices agriculture and large-scale commercial farming with indiscriminate use of chemicals in many parts of the world that may result in the loss of good native ecosystems.

    (b) Fears of a possible collision of a meteorite with the Earth in the near future in the manner it happened 65million years ago that caused the mass extinction of many species including those of dinosaurs.

    (c) Large scale cultivation of genetically modified crops in many parts of the world and promoting their cultivationin other Parts of the world which may cause the disappearance of good native crop plants and the loss offood biodiversity.

    (d) Mankind’s over-exploitation/misuse of natural resources, fragmentation/loss, natural habitats, destructionof ecosystems, pollution and global climate change.

    Hangenberg crisis

    • The Earth suffered an intense loss of species diversity that lasted for at least 300,000 years.
    • The event is thought to have been caused by long-lasting ozone depletion, which would have allowed much more of the Sun’s ultraviolet (UV) radiation to reach and harm life on Earth.
    • It was called the Hangenberg crisis.

    What did researchers find?

    • Extensive volcanism and global warming can also rupture the ozone layer but shreds of evidence for these are indefinite as far as the time period is concerned.
    • So, they up that one or more supernovae explosions, at a distance of 65 light-years away from the Earth, may have caused a prolonged loss of ozone.
    • Betelgeuse, a supernova, around 600 light-years away and present outside the kill distance of 25 light-years poses a danger today.
    • Events like gamma-ray bursts, solar eruptions and meteorite collisions end up very soon. As such, they cannot pave the way for gradual ozone depletion that took place at the close of the Devonian aeon.
    • A supernova event can be powerful enough to bathe its galaxy in light for days and months alike. It can be spotted across the universe as well.

    Why Supernovae are considered dangerous?

    • Supernovae (SNe) are quick sources of ionizing photons that include fatal X-rays, UV and gamma rays.
    • Over a longer period of time, the bang clashes with the nearby gas, resulting in a shockwave that causes particle acceleration.
    • As such, cosmic rays are generated by SNe. These charged particles with high energies get magnetically confined on the inside of SN remains.
    • The fossil evidence shows a 300,000-year shrink in biodiversity leading the way to Devonian-Carboniferous Boundary (DCB) mass extinction.
    • This puts forward the possibility of multiple catastrophes or multiple supernovae explosions.

  • [pib] Nationally Determined Contributions (NDC) Transport Initiative for Asia (TIA)

    NITI Aayog will virtually launch the India Component of the Nationally Determined Contributions (NDC)–Transport Initiative for Asia (TIA).

    Try this PYQ:

    Q.The term Intended Nationally Determined Contribution is sometimes seen in the news in the context of:

    (a) Pledge made by the European countries to rehabilitate refuges from the war-affected Middle East.

    (b) Plan of nation outlined by the countries of the world to combat climate changes.

    (c) Capital contributed by the member countries in the establishment of Asian Infrastructure Investment Bank.

    (d) Plain of action outlined by the countries of the regarding SDGs.

    What is NDC-TIA?

    • It is a joint programme, supported by the International Climate Initiative (IKI) of the German Ministry for the Environment, Nature Conservation and Nuclear Safety (BMU).
    • On behalf of the GoI, NITI Aayog will be the implementing partner.
    • It aims to promote a comprehensive approach to decarbonize transport in India, Vietnam, and China.
    • It is implemented by a consortium of seven other organisations.

    Working

    • The programme has a duration of 4 years.
    • The India Component will focus on establishing a multi-stakeholder dialogue platform for decarbonizing transport in India, strengthening GHG and transport modelling capacities.
    • It would help in financing climate actions in transport, offering policy recommendations on electric vehicle (EV) demand and supply policies.

    Why need TIA?

    • India has a massive and diverse transport sector that caters to the needs of billion people.
    • It has the world’s second-largest road network, which contributes to maximum GHG emissions through all means of transportation.
    • With increasing urbanisation, the fleet size i.e. the number of sales of vehicles is increasing rapidly.
    • It is projected that the total number of vehicles will be doubled by 2030.

  • What is Biochar?

    A new research has shown that Biochar application is more effective in promoting pulses growth and yield in Ghana.

    Try this PYQ:

     

    Q.In the context of which one of the following are the terms ‘pyrolysis and plasma gasification’ mentioned? (CSP 2019)

    (a) Extraction of rare earth elements

    (b) Natural gas extraction technologies

    (c) Hydrogen fuel-based automobiles

    (d) Waste-to-energy technologies

    What is Biochar?

    • Biochar is a high-carbon, fine-grained residue that is currently produced through modern pyrolysis processes (direct thermal decomposition of biomass in the absence of oxygen and preventing combustion).
    • It produces a mixture of solids (the biochar proper), liquid (bio-oil), and gas (syngas) products.
    • Biochar may increase soil fertility of acidic soils (low pH soils), increase agricultural productivity, and provide protection against some foliar and soil-borne diseases.

    Its benefits

    • Carbon Sink: The burning and natural decomposition of biomass releases large amounts of carbon dioxide and methane to the Earth’s atmosphere. The biochar production process also releases CO2 (up to 50% of the biomass); however the remaining carbon content is stable indefinitely.
    • Soil Amendment: Biochar is recognized as offering a number of soil health benefits. The extremely porous nature of biochar is found to be effective at retaining both water and water-soluble nutrients. Its presence in the earth can improve water quality, increase soil fertility, raise agricultural productivity, and reduce pressure on old-growth forests.
    • Water retention: Biochar is hygroscopic. Thus it is a desirable soil material in many locations due to its ability to attract and retain water.

    ————————-//———————-

    Back2Basics

    What is Pyrolysis?

    • Pyrolysis is the thermal decomposition of materials at elevated temperatures in an inert atmosphere.
    • It involves a change in chemical composition. The word is coined from the Greek-derived elements pyro “fire” and lysis “separating”.
    • It is most commonly used in the treatment of organic materials. It is one of the processes involved in charring wood.
    • It is considered as the first step in the processes of gasification or combustion.

    How does it work?

    • In general, pyrolysis of organic substances produces volatile products and leaves a solid residue enriched in carbon, char.
    • Extreme pyrolysis, which leaves mostly carbon as the residue, is called carbonization.
    • The process is used heavily in the chemical industry, for example, to produce ethylene, many forms of carbon, and other chemicals from petroleum, coal, and even wood, to produce coke from coal.

  • BIS’ draft standard for drinking water supply

    The Bureau of Indian Standards (BIS) has prepared a draft standard for the supply system of piped drinking water.

    Try this question for mains:

    Q.Climate change, scarcity, population growth, demographic changes and urbanization pose challenges for water supply systems in India. Analyse.

    About the Draft

    • Labelled ‘Drinking water supply quality management system — requirements for piped drinking water supply service’, the draft has been prepared by the BIS’ Public Drinking Water Supply Services Sectional Committee.
    • It outlines the process of water supply, from raw water sources to household taps.
    • It has been developed keeping in view the Centre’s Jal Jeevan Mission for providing safe and adequate drinking water to all rural households by 2024 through tap connections.
    • It is expected to make the process of piped water supply more uniform, especially in rural and underdeveloped areas of the country where the system runs on various government orders and circulars.
    • At present, the standard is expected not to be made mandatory.

    Highlights of the draft

    • The draft outlines the requirements for a water supplier or a water utility on how they should establish, operate, maintain and improve their piped drinking water supply service.
    • The process begins with the identification of a water source, which can either be groundwater or surface water sources such as rivers, streams or reservoirs.
    • It doesn’t mention how water utilities should treat the water, but states that the process should be planned in such a manner that after treatment it should conform to the Indian Standard (IS) 10500 developed by the BIS.
    • The IS 10500 outlines the acceptable limits of heavy metals such as arsenic, and other parameters like the pH value of water, its turbidity, the total dissolved solids in it, and the colour and odour.

    What is the water supply process?

    • The supply system as outlined in the draft should begin with the identification of a raw water source.
    • Water should then be pumped into the treatment plant and treated to achieve acceptable drinking standards.
    • After the water is released from the plant, there should be reservoirs in the distribution system for storage of this water, and disinfection facilities to get rid of contamination at any stage of distribution.
    • Pumping stations or boosters, if necessary, should be provided to maintain adequate pressure throughout the distribution system.

    District Metering Area (DMA) concept

    • The document also states that the concept of district metering area (DMA) should be adopted where possible.
    • DMA is a concept for controlling leakages in the water network, which is essentially divided into a number of sectors, called the DMAs, and where flow meters are installed to detect leaks.
    • The water supplier/utility may provide bulk water meters in the water distribution system to ensure water audit, however, the provisions should be made for domestic meters also.

    What’s there in the draft in addition to the water supply process?

    • There are guidelines on water audit, which is a calculation of the amount of water put into distribution against the amount that is consumed.
    • The draft states that a water audit should be conducted on a quarterly basis.
    • Effort should be made by the water agency to bring down the water loss up to 15% of the total water supplied in the system.
    • The water utilities are also required to conduct surveys among consumers and obtain feedback on their service as per the draft.
    • Guidelines on internal audit, management review, documenting performance indicators for improvement, and timely action against non-conformity issues also find mention.

  • Gorumara National Park

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

    Try this PYQ:

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

    (a) Manas National Park

    (b) Namdapha National Park

    (c) Neora Valley National Park

    (d) Valley of Flowers National Park

    Gorumara NP

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

    About Gaur

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

  • Micro-plastic Pollution in Atlantic Ocean

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

    Highlights of the report

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

    Try this PYQ:

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

    (a) They are considered harmful to marine ecosystems.

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

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

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

    What are Microplastics?

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

    How does plastic reach the oceans?

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

    Why is plastic pollution especially harmful?

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

    Impact on humans

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

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

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

    Try this question:

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

    What is the case?

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

    About PM CARES Fund

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

    What did the Court rule?

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

    Also read:

    PM-CARES Fund

  • Bioethanol Blending in Petrol

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

    Try this PYQ:

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

    (a) Jatropha

    (b) Maize

    (c) Pongamia

    (d) Sunflower

    What is Ethanol Blended Petrol (EBP) Program?

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

    Bio-ethanol blend in India

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

    Hurdles in meeting the demand

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

    Way ahead

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

  • Tornado’s dynamics and its India connection

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

    Try this PYQ:

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

    (a) Sea surface temperatures are low

    (b) Inter-Tropical Convergence Zone seldom occurs

    (c) Coriolis force is too weak

    (d) Absence of land in those regions

    What is a Tornado?

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

    Who was Babu ChunderSikur Chatterjee?

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

    His work

     

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

    Back2Basics