Question

NCERT VI Social Sciences

What dangers will we have to face if the proportions of oxygen and nitrogen in the air undergo a change?

Answer 1

due to the increase in oxygen level ,everything  can burn easily in the atmosphere  an it will have more negative effects than positives .
lowering of oxygen level can cause difficulty for respiration .nitrogen  gas is also  essential for living beings. lack of nitrogen  will affect plant growth badly .therefore always nitrogen should be the solvent in air .