CO2 - release gas in atmosphere in every day lives e.g car exhausts , burn fossil fuels.
Deforestation is cutting down of timber , timber being burnt release gas.
CH4 - Produced naturally e.g rotting plants.
Can be man-made production e.g rice growing ,cattle rearing . Cows pump out gas
NO - Released naturally by bacteris , soils and ocean . Lot released from soil after fertiliser added
Also released in vehicle engines and industry
CFC - Man-mad chemicals that were once used in aerosol sprays and fridges. Really powerful gases
Most countries don't produce them because they damage ozone layer and prevent UV Radiation reaching earth
CFC still get released from leaked fridges
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