A. choose ur answer

*greenhouse effect* *garbage*
*Ozone layer* *pollutants*
*acid rain*


1._______is scatted on land some of which eventually go to rivers and lakes that makes environment polluted.

2._______subtances which come from factories, vehicles, volcanoes and burning activities of human.

3._______the is layer of the atmosphere which filters harmful ultraviolet rays of the sun.

4._______is a team that describes how natural gases in the earth's atmosphere reduce the amount of heat escaping from the earth in the atmosphere

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