Which is not a renewable source?

When rain is accompanied by a thunderstorm,the $pH$ value of the collected rainwater is ......

The smog which acts as an oxidizing agent is .....

Which of the following statements are correct?
$A$. Ocean is a sink for $CO_2$.
$B$. Greenhouse effect causes lowering of the temperature of the earth's surface.
$C$. To control $CO$ emission by automobiles,usually catalytic converters are fitted into exhaust pipes.
$D$. $H_2SO_4$,herbicides,and insecticides form mist.

An increase in the concentration of $CO_2$ in the atmosphere will result in ........

The biosphere is: