The depletion of the ozone layer in the stratosphere is responsible for which of the following?

State the name of components of photochemical smog and mention two solutions to control photochemical smog.

List gases which are responsible for the greenhouse effect.

Match the following:
| List-$I$ | List-$II$ |
| :--- | :--- |
| $A$. Methemoglobinemia | $I$. $1 \ ppm$ of dissolved oxygen in water |
| $B$. Kidney damage | $II$. $1000 \ ppb$ of lead in drinking water |
| $C$. Bones and teeth damage | $III$. $BOD$ of drinking water is $2 \ ppm$ |
| $D$. Growth of fish is stopped | $IV$. $2000 \ ppm$ of nitrates in drinking water |
| | $V$. $50 \ ppm$ of fluoride in drinking water |

Name the pollutants found in the troposphere.

The basic component of smog is