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

  • Climate change causing a shift in Earth’s axis, finds new study

    About the study

    • A study is published in Geophysical Research Letters of the American Geophysical Union (AGU).
    • The study has added yet another impact of climate change on the earth – marked shifts in the axis along which the Earth rotates.
    • It says that due to the significant melting of glaciers because of global temperature rise, our planet’s axis of rotation has been moving more than usual since the 1990s.

    How the earth’s axis shifts

    • The Earth’s axis of rotation is the line along which it spins around itself as it revolves around the Sun.
    • The points on which the axis intersects the planet’s surface are the geographical north and south poles.
    • The location of the poles is not fixed, however, as the axis moves due to changes in how the Earth’s mass is distributed around the planet.
    • Thus, the poles move when the axis moves, and the movement is called “polar motion”.
    • Generally, polar motion is caused by changes in the hydrosphere, atmosphere, oceans, or solid Earth.
    • But now, climate change is adding to the degree with which the poles wander.

    What the study says

    • As per the study, the north pole has shifted in a new eastward direction since the 1990s, because of changes in the hydrosphere (meaning the way in which water is stored on Earth).
    • From 1995 to 2020, the average speed of drift was 17 times faster than from 1981 to 1995.
    • The faster ice melting under global warming was the most likely cause of the directional change of the polar drift in the 1990s, the study says.
    • The other possible causes are terrestrial water storage change in non‐glacial regions due to climate change and unsustainable consumption of groundwater.

  • Melting of Glaciers

    Glaciers shrinking faster than before

    • A new study by ETH Zurich and University of Toulouse researchers finds that the world’s glaciers are shrinking at a faster rate than before.
    •  If the trend continues this will put the densely-populated parts of Asia at risk of flood and water shortages.
    • The study found the world’s ice fields lost 298 gigatons of ice per year from 2015 to 2019, a 30% increase in the rate of retreat compared with the previous five years.
    • Glaciers in Alaska, the Alps and Iceland are among those disappearing at the fastest pace.
    • The scientists used images from a special camera aboard NASA’s Terra satellite, which has circled the Earth every 100 minutes since its launch in 1999.

    Impact

    • The situation in the Himalayas is particularly worrying.
    • Swathes of India and Bangladesh could face water stress during dry periods when major rivers like the Ganges and Indus are mainly fed by glacial runoff.
    • Glaciers typically accumulate ice in the winter, but a warming climate means summer melting has outstripped those gains and caused a net loss of ice in mountain regions.
    • The melting in turn contributes to global warming and indirectly accelerates sea level rise, raising the risk of flooding faced by coastal communities.

  • Rare white-bellied heron spotted in Arunachal Pradesh

    About the bird

    • The white-bellied heron is categorised as ‘critically endangered’ in International Union for Conservation of Nature (IUCN) Red Data Book.
    • It is listed in Schedule IV in the Wildlife Protection Act, 1972.
    • It is one of the rarest birds in the world and is found only in Bhutan, Myanmar and the Namdapha Tiger Reserve in Arunachal Pradesh.
    • It had also been recorded in the adjacent Kamlang Tiger Reserve in Lohit district in camera trap images.

    Significance of recent sighting

    • The recent sighting at a height of 1,200 metres above sea level is a first at such a higher elevation in India.
    • The presence of nesting sites within this area is a positive sign for the future habitat as the breeding season of the white-bellied heron starts in February and lasts till June.
    • It is great news that the critically endangered bird is establishing new habitat beyond its traditional range.

  • Delhi’s air quality deteriorates, again

    Air quality to oscillate between poor to very poor

    • Delhi’s air quality deteriorated from ‘moderate’ to ‘poor’ and ‘very poor’ on April 29.
    • It will be oscillating between ‘poor’ and ‘very poor’ for the next three days, according to the SAFAR-System of Air Quality and Weather Forecasting and Research.
    • Delhi’s air typically worsens in October-November and improves by March-April.

    What is the cause

    • Current weather conditions are not unfavourable, unlike in winter.
    • Hence, apart from local emissions, the deterioration in air quality is being attributed to an increase in fire counts, mostly due to burning of wheat crop stubble in northern India.
    • Deteriorating air quality is worrying amid an increasing number of novel coronavirus disease (COVID-19) and deaths.

    Quality classification

    • An AQI between 0-50 is considered ‘good.
    • An AQI between 51-100 is considered satisfactory.
    • An AQI between 101-200 is considered moderate.
    • An AQI between 201-300 is considered poor.
    • An AQI between 301-400 is considered very poor.
    • An AQI between 401-500 is considered severe.
    • Above 500 is the ‘severe-plus’ or ‘emergency’ category.

  • No mass nesting of Olive Ridley turtles at Rushikulya in Odisha this year

    No mass nesting this year

    • The annual spectacle of the mass nesting of millions of Olive Ridley sea turtles near the Rushikulya river mouth in Odisha is likely to be missed this year, as the time for it is almost over.
    • It’s been around one month since the mass nesting of last year.
    • If they do skip the beach, this won’t be the first time.
    • In 2002, 2007, 2016 and 2019, the turtles had not shown up at Rushikulya.
    • The Rushikulya river mouth is considered the second-biggest rookery in India after Gahirmatha.
    • Mass nesting in the Gahirmatha marine sanctuary occurred from March 9-23, 2021 and over 349,000 eggs were laid during this period.

    What could explain the miss in mass nesting

    • It is a natural phenomenon. During some years, they did not turn up for mass nesting even though a huge number had congregated in the sea.
    • Beach erosion might be one of the causes for the turtles staying away this year.

  • Major oil and gas producers form Net Zero Producers’ Forum

    About the Net Zero Producers’ forum

    • Five of the world’s major oil and gas producers are working together to ‘develop pragmatic net-zero emission strategies’.
    • Qatar, the US, Saudi Arabia, Canada and Norway, collectively responsible for 40% of global oil and gas production, will come together to form a cooperative forum that will develop pragmatic net zero-emission strategies.
    • Energy producers are faced with unique responsibilities to furnish the world with energy but the climate crisis requires serious leadership and a strong alliance to deliver a path to net-zero.

    Strategies and technologies

    • The Net Zero Producers’ Forum will consider strategies and technologies which include methane abatement, circular carbon economy approach, development and deployment of clean energy and carbon capture and storage technologies, diversification from reliance on hydrocarbon revenues etc.

    Source:

    https://www.energy.gov/articles/joint-statement-establishing-net-zero-producers-forum-between-energy-ministries-canada

  • Limited sops make scrappage policy for vehicles unattractive

    Why the Vehicle Scrappage Policy is unattractive

    • The policy proposes to de-register vehicles that fail fitness tests or are unable to renew registrations after 15-20 years of use.
    • Limited incentives and poor cost economics for trucks in the Vehicle Scrappage Policy, coupled with lack of addressable volumes for other segments is unlikely to drive freight transporters to replace their old vehicles with new ones, said a Crisil report.
    • Though the scrappage volume of buses, PVs and two-wheelers is expected to be limited as well, the policy’s impact on new commercial vehicle (CV) sales could be sizeable, based on addressable volume, ratings agency Crisil Research said in its report.
    • The potential benefit from scrapping a 15-year-old, entry-level small car will be ₹70,000, whereas its resale value is around ₹95,000. That makes scrapping unattractive, Crisil said in the report.

  • Eastern India most vulnerable to climate change, says study

    About the report

    • Published this week, the report on ‘Climate vulnerability assessment for adaptation planning in India using a common framework’ was conducted in 2019-2020 across 29 States.
    • It was part of a capacity building programme under the National Mission on Sustaining the Himalayan Ecosystem and National Mission on Strategic Knowledge for Climate Change.
    • The report was prepared by IISc, IIT-Mandi and IIT-Guwahati.

    Major findings

    • Along with Chhattisgarh in central India, Jharkhand, Mizoram, Odisha, Assam, Bihar, Arunachal Pradesh, and West Bengal are the eight most vulnerable States.
    • These eight most vulnerable States require prioritisation of adaptation interventions.
    • Jharkhand, with the highest vulnerability indices VI of 0.674, topped the list of States most vulnerable to climate change.
    • The major drivers for the vulnerability of all the States included lack of forest area per 1,000 rural population, lack of crop insurance, marginal and small operational land holding, low density of health workers, low participation of women in the workforce, yield variability of food grains, and a high proportion of the population below the poverty line.
    • Tamil Nadu and Kerala are among seven States that are the least vulnerable but there’s more to it meets the eye.
    • However, the vulnerability indices (VIs) for these seven States range from the lowest of 0.419 for Maharashtra to 0.468 for Uttarakhand, which is on the higher side.

  • India-U.S. climate partnership

    Leaders Summit on Climate

    • Leaders Summit on Climate included 40 heads of state and government.
    • At the summit, President of the United State and Indian Prime Minister launched the ‘India-U.S. climate and clean energy Agenda 2030 partnership’. 
    • The goal of the partnership are given below:
    • 1) Mobilise finance and speed clean energy deployment.
    • 2) Demonstrate and scale innovative clean technologies needed to decarbonise sectors, including industry, transportation, power, and buildings.
    • 3) Build capacity to measure, manage, and adapt to the risks of climate-related impacts.

    India’s progress on NDC

    • Despite development challenges, India has taken many bold steps on clean energy, energy efficiency, afforestation and bio-diversity.
    • That is among the few countries whose NDCs are 2-degree-Celsius compatible.
    •  India is targeting a 2030 GDP emissions intensity ( i.e., volume of emissions per unit of GDP) that is 33%-35% below 2005 levels.
    • It also seeks to have 40% of power generated from non-fossil fuel sources by 2030.
    •  India’s per capita carbon footprint is 60% lower than the global average.

  • Global Energy Review 2021 report

    Initial estimates for 2020 energy demand and CO2 emission was released recently in an annual report Global Energy Review by International Energy Agency (IEA).

    https://www.world-nuclear-news.org/BlankSiteASPX/media/WNNImported/mainimagelibrary/corporate%20branded/Global-Energy-Review-2021-(IEA).jpg?ext=.jpg

    • The Global Energy Review is annual update on the latest trends in world energy and CO2 emissions.
    • It covers all the main fuels and technologies, providing insights across regions, economies and countries.

    Highlights of the report:

    • Global energy-related carbon dioxide (CO2) emissions are on course to surgeby 1.5 billion tonnes in 2021 driven by in the resurgence of coal use in the power sector.
      • The second-largest increase in history.
      • This would be the biggest annual rise in emissions since 2010, during the carbon-intensive recovery from the global financial crisis.
    • CO2 emissions will increase by almost five per cent in 2021 to 33 billion tonnes.
      • The key driver is coal demand, which is set to grow by 4.5 per cent, surpassing its 2019 level and approaching its all-time peak from 2014, with the electricity sector accounting for three-quarters of this increase.
    • Global energy demand is set to increase by 4.6 per cent in 2021, led by emerging markets and developing economies, pushing it above its 2019 level.
    • Demand for all fossil fuels is on course to grow significantly in 2021, with both coal and gas set to rise above their 2019 levels.
    • Oil is also rebounding strongly but is expected to stay below its 2019 peak, as the aviation sector remains under pressure.
      • More than 80 per cent of the projected growth in coal demand in 2021 is set to come from Asia, led by China.
    • Electricity generation from renewables is set to leap by over eight per cent in 2021.
    • The biggest contribution to that growth comes from solar and wind.
      • Electricity generation from wind is projected to grow by 275 terawatt-hours, or around 17 per cent, from last year.
      • Electricity generation from solar PV is expected to increase by 145 terawatt-hours, up almost 18 per cent from last year.
      • Their combined output is on track to reach more than 2800 terawatt-hours in 2021.
    • Renewables are set to provide 30 per cent of electricity generationworldwide in 2021.
    • China is expected to account for almost half of the global increase in electricity generation from renewables, followed by the US, the European Union and India.