Question

Don't ignore it give detailed and fully explained answers you may take help of factual data.........

Why oxygen decreases when we move towards sky? Is any chances to decrease air pollution if yes how is it?

Answer 1

Hello here is your answer.....

Air pressure decreases because there is less air above you pushing down. If the pressure on a gas decreases, its volume increases. Per volume unit there is then less gas, includingoxygen.
Yes, there is a chance to decrease air pollution.
As going to higher altitude the unit of gases is less...

Answer 2

$<b><u><i>$ Hey there !

$\huge{ANSWER:}$

Air pressure decreases because there is less air above you pushing down. If the pressure on a gas decreases, its volume increases. Per volume unit there is then less gas, including oxygen.

Prevention of air pollution :-

☢Using smokeless sources of energy such as smokeless stoves, which use biogas, and solar energy, etc.

☢Using devices for filtering smoke in chimneys of factories and powerhouses.

☢By planting more trees.

☢By locating industries away from residential areas.

Hope it helps you ! ✌✌