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Home Environment

Global Methane Pledge

November 4, 2021
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In news- Recently, the Global Methane Pledge was launched at the ongoing UN COP26 climate conference in Glasgow.

About Global Methane Pledge-

  • It is an effort led jointly by the United States and the European Union.
  • It is essentially an agreement to reduce global methane emissions. 
  • One of the central aims of this agreement is to cut down methane emissions by up to 30 per cent from 2020 levels by the year 2030.
  • The pledge covers countries which emit nearly half of all methane, and make up 70% of global GDP.
  • Over 90 countries have signed this pledge so far.

About Methane & its sources-

  • Methane is the second-most abundant greenhouse gas in the atmosphere, after carbon dioxide.
  • It is also a component of natural gas.
  • Around 40% of CH4 comes from natural sources such as wetlands but the bigger share now comes from a range of human activities, ranging from agriculture such as cattle and rice production to rubbish dumps.
  • Human sources of methane include landfills, oil and natural gas systems, agricultural activities, coal mining, wastewater treatment, and certain industrial processes, the US Environmental Protection Agency notes.
  • The oil and gas sectors are among the largest contributors to human sources of methane.
  • Human sources of methane are responsible for 60 per cent of global methane emissions. 
  • These emissions come primarily from the burning of fossil fuels, decomposition in landfills and the agriculture sector.

Its impact on the environment-

  • As per International Energy Agency (IEA), methane has a much shorter atmospheric lifetime (12 years as compared to centuries for CO2).
  • It is a much more potent greenhouse gas simply because it absorbs more energy while it is in the atmosphere.
  • As per UN, methane is a powerful pollutant and has a global warming potential that is 80 times greater than carbon dioxide, about 20 years after it has been released into the atmosphere.
  • According to the latest Intergovernmental Panel on Climate Change report, methane accounts for about half of the 1.0 degrees Celsius net rise in global average temperature since the pre-industrial era.
  • According to the UN, 25 percent of the warming that the world is experiencing today is because of methane.

Coalbed methane-

  • CBM, like shale gas, is extracted from what are known as unconventional gas reservoirs — where gas is extracted directly from the rock that is the source of the gas (shale in case of shale gas and coal in case of CBM).
  • The methane is held underground within the coal and is extracted by drilling into the coal seam and removing the groundwater. 
  • The resulting drop in pressure causes the methane to be released from the coal.
  • In India, for instance, in 2019, the Ministry of Coal asked state-run coal miner Coal India Limited (CIL) to produce 2 MMSCB (million metric standard cubic metres) per day of coalbed methane (CBM) gas in the next 2 to 3 years.
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Source: The Indian Express
Tags: News PaperPrelims

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