Question

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The air was cleaner before factories and cars were invented.
This is because​

Answer 1

Hello mate ...

The harmful pollutants released from automobiles are the main cause of air pollution..

Sulphur, carbon monoxide and gases as such are making air more polluted day by so ..

So before the invention of the luxurious road heating Vehicles air was expected to be more clear...

Regards. ....

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