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Air pollution is when harmful gases or 

substances are introduced into the atmosphere, 

these are harmful for humans, plants, and animals. 

The main cause of air pollution is humans. Human 

activities like burning coal, factories working, and 

cars are maybe some of the most known.

Smog is our most obvious and familiar pollutant, but 

there are many more visible and invisible pollutants. 

Any substance introduced in the atmosphere is 

considered air pollution.

Carbon dioxide is a greenhouse gas and is the main 

pollutant of global warming. Living things breath out 

carbon dioxide (except plants), but when associated with 

cars, planes or power plants and other human activities that 

burn fossil fuels like petroleum, it is considered a pollutant. 

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