Ultraviolet radiation breaks down $CFC$ molecules to produce .....

Given below are two statements:
Statement $I$: Non-biodegradable wastes are generated by the thermal power plants.
Statement $II$: Bio-degradable detergents lead to eutrophication.
In the light of the above statements,choose the most appropriate answer from the options given below:

Cataract and skin cancer are caused by

What are the reactions involved for ozone layer depletion in the stratosphere?

Aldehydes are produced in the atmosphere by:

The enamel present on teeth becomes much harder due to the conversion of $[3 Ca_3(PO_4)_2, X]$ into $[3 Ca_3(PO_4)_2, Y]$. What are $X$ and $Y$?