Question

how is the air useful to us

Answer 1

Air is important in following ways .
. for breathing
. for photosynthesis
. for propogation of sound
. for propogation of light.

Answer 2

Air is the important component for the life existence of human being.

Explanation:

The air gives energy for the function of living things. Plants get their food from the event of Photosynthesis. Photosynthesis happens with the help of oxygen.

Nitrogen is very useful for the growth of plants as well as trees. Air is the major source for rain. The water vapour helps for the production of rain. Air pollution should be reduced to avoid many hazards.