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Climate change

Tue 12 Oct, 2021

Why in news ?

  • British Prime Minister Boris Johnson spoke to Prime Minister Narendra Modi recently, urging India to announce a “more ambitious” Nationally Determined Contribution (NDC) ahead of a United Nations climate change summit in the U.K. in a few weeks.

Static 

  • Climate - condition of temperature, humidity, pressure, wind, rainfall, and other meteorological elements on the Earth's surface for a long time.
  • Climate change is an old phenomenon. But currently considered as alteration in climatic conditions due to anthropogenic processes resulting in change of the global atmosphere.
  • Global warming – “Global warming is a gradual increase in the earth’s temperature generally due to the greenhouse effect caused by increased levels of carbon dioxide, CFCs, and other pollutants.
  • Reasons: Greenhouse gases released + Fossil fuels combustion + Deforestation + Agriculture & livestock.
  • Green house effect : A naturally occurring phenomenon that blankets earth’s lower atmosphere and warms it, maintaining temperature suitable for living things to survive.
  • They balance cooling and warming of the earth.
  • In the absence of this, earth surface temperature would be -19 degrees Celsius instead of current 15 degrees Celsius.