Peroxyacetyl nitrate $(PAN)$,an eye irritant,is produced by:

Write a note on the effect of various pesticides on living things.

The reaction of $.....$ with $O_3$ leads to a decrease in the concentration of ozone by approximately $40\%$.

Green plants use carbon dioxide during photosynthesis and release oxygen,yet carbon dioxide is considered responsible for the greenhouse effect. Why?

Over $10 \ ppm$ fluoride causes

The acceptable level of carbon monoxide gas $(CO)$ in the atmosphere in $ppm$ level is