12. NITROUS OXIDE It is generated due to burning biomass, agriculture, livestock waste, nitrogen rich fuels. It accounts for 6% of the gases responsible for global warming.
13. METHANE Methane accounts for 16% of all gases responsible for global warming . It is estimated that nearly 30 to 200 million tones of methane is released every year. The main source of methane is rice field.
14. Chlorofluorocarbon [CFCS] It accounts for nearly 20% of the gases responsible for global warming. These are non-toxic, nonflammable & highly stable compounds. They are also used as coolants in compressors of air conditioners & refrigerators. They are also use in insulators, fire extinguishers, aerosol etc.
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