Among the following,the one that is not a greenhouse gas is

Acid rain is caused by the presence of $X$ and $Y$ in air. $X, Y$ are respectively

Given below are two statements:
Statement $I$: An allotrope of oxygen is an important intermediate in the formation of reducing smog.
Statement $II$: Gases such as oxides of nitrogen and sulphur present in the troposphere contribute to the formation of photochemical smog.
In the light of the above statements,choose the correct answer from the options given below:

Addition of phosphate fertilisers to water bodies causes

The acid that is believed to be mainly responsible for the damage of the Taj Mahal is ...

Which region of the atmosphere is the domain of all living organisms?