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Match the pollutants with their sources.
Pollutants Sources
(a) CFCs i Cattle, marshes, rice fields
(b) Ozone ii Combustion of fossil fuels, wood
(c) Methane iii Refrigerators, air conditioners, aerosols
(d) ${CO}_{2}$ iv Secondary pollutant from car exhausts
(a) (b) (c) (d)
1. iii iv i ii
2. iv iii i ii
3. iii i iv ii
4. ii iv i iii

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Detailed Solution

CFCs	Refrigerators, air conditioners, aerosols
Ozone	Secondary pollutant from car exhausts
Methane	Cattle, marshes, rice fields
CO₂	Combustion of fossil fuels, wood

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