Answers

2015-12-07T20:31:44+05:30
Pollution of air
causes:
large amount of smoke produced in factories
deforestation
increase in global warming because of CO2 increase
usage of non-renewable resources
burning of garbage materials in rural areas
 
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2015-12-07T22:27:20+05:30
When air is contaminated by unwanted substances which have harmful effect(s) on both the living and nonliving, it's referred to air pollution .

1. Excessive burning of fossil fuels like coal, petrol diesel etc.
2. Smoke from factories and vehicles
3. Use of certain substances like CFCs
hope this will help !!

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