Among the following,the one which is not a "green house gas" is:

When plants and animals decay,the organic nitrogen is converted into inorganic nitrogen. The inorganic nitrogen is in the form of

Green plants use carbon dioxide during photosynthesis and release oxygen,yet carbon dioxide is considered responsible for the greenhouse effect. Why?

For dry cleaning of clothes,instead of tetrachloroethene,which is carcinogenic in nature,which of the following solvents can be used?

The component that is present in both the troposphere and the stratosphere is $......$.

Summarize the primary information regarding water pollution.