Question

how is air useful to us ?​

Answer 1

Answer:

air is the important and most useful element for our life which makes the earth the unique planet too and because of air we can breathe

Answer 2

Answer:

We breathe air. So it’s useful to us because we would suffocate without it. As would plants by the way.

Also, our bodies are accustomed to the air pressure we have on Earth; 1 bar pressure at sea-level. In a vaccuum our bodies would be severely harmed.