Q. 55.0( 1 Vote )

Matching the column I and column II 1

Answer :

1) GHG (c) Global Warming


A greenhouse gas is a gas that traps infrared rays and prevents heat from escaping the earth, thus causing global warming.


2) CFCs (b) Methane


A chlorofluorocarbon is a organic compound that is a volatile derivative of methane, ethane and propane.


3) PAN (d) Smog


Peroxyacyl nitrate is a type of air pollution that is part of photochemical smog. Basically PAN’s are respiratory and eye irritants.


4) Lichen (a) Paedogenesis


Lichens grow on rock surface and bring about biological weathering of rocks. While they grow they release some substances that cause rock suface to powder form a thin layer of soil. Paedogenesis is the final step in soil formation where bacteria and fungi decompose organic matter leading to humification.


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