Global Methane Pledge

Global Methane Pledge

Subject – Environment

Context –The Global Methane Pledge was launched at the ongoing UN COP26 climate conference in Glasgow

Concept –

• The Global Methane Pledge was launched at the ongoing UN COP26 climate conference in Glasgow.
  • So far, over 90 countries have signed this pledge, which is an effort led jointly by the United States and the European Union.
• Methane is the second-most abundant greenhouse gas in the atmosphere, after carbon dioxide, and, therefore, pledges related to cutting down its emissions are significant.
• The pledge was first announced in September by the US and EU, and 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.
• Among the signatories is Brazil — one of the five biggest emitters of methane, which is generated in cows’ digestive systems, in landfill waste and in oil and gas production.
  • Three others —China, Russia and India — have not signed up.
  • Australia has said it will not back the pledge.
• 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.

About Methane –

• According to the UN, 25 per cent of the warming that the world is experiencing today is because of methane, a greenhouse gas, which is also a component of natural gas.
• Because it is a greenhouse gas, its presence in the atmosphere increases Earth’s temperature.
• There are various sources of methane including human and natural sources.
  • Human sources of methane include landfills, oil and natural gas systems, agricultural activities, coal mining, wastewater treatment, and certain industrial processes
    • The oil and gas sectors are among the largest contributors to human sources of methane.
    • NASA notes that human sources (also referred to as anthropogenic 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.
    • 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.
    • According to the International Energy Agency (IEA), while 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.
    • 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.
    • The IEA has also said that more than 75 per cent of methane emissions can be mitigated with the technology that exists today, and that up to 40 per cent of this can be done at no additional costs.

To know more about Methane, please refer September 2021 DPN.