The smog known as London smog is .....

Which among the following statements about ozone depletion is $NOT$ true?

Identify $X$,$Y$,and $Z$ in the following reaction. (Equation not balanced)
$ClO + NO_2$ $\rightarrow \underline{X}$ $\xrightarrow{H_2O} \underline{Y} + \underline{Z}$

What is the percentage contribution of $CFCs$ to global warming compared to ozone (in $\%$)?

When a huge amount of sewage is dumped into a river,the $BOD$ will

Name the pollutants found in the troposphere.