Why is acid rain considered a threat to Taj Mahal?
The air where Taj Mahal (in Agra) is located, contains very high levels of sulphur and nitrogen oxides. The resulting acid rain reacts with marble (CaCO3) of Taj Mahal.
As a result, the wonderful monument is being slowly eaten away and the marble is getting discoloured and lustreless.
What are the consequences of green house effect?
Or
What is the effect on the global warming due to the green house effect?