Which of the following is not a common component of photochemical smog?

Which one of the following statements related to photochemical smog is not correct?

Ultraviolet radiation is absorbed by

Liquid carbon dioxide with a suitable detergent is an alternative solvent to tetrachloroethene in dry cleaning. What kind of environmental damage is prevented by avoiding the use of tetrachloroethene? Is the use of liquid carbon dioxide with detergent appropriate from a pollution perspective? Explain.

If the concentration of nitrate in drinking water exceeds $45 \ ppm$,which disease is likely to occur in children?

Environmental pollution is the effect of undesirable changes in the properties of our air,land,water,or soil that may harmfully affect...