Taj Mahal is being slowly disfigured and discoloured. This is primarily due to :
(1) global warming
(2) acid rain
(3) water pollution
(4) soil pollution
Correct option (2) acid rain
Explanation:
Acid rain reacts with marble, CaCO3 of Taj Mahal causing damage to monument and Monument is being slowly disfigured and the marble is getting discoloured and lustreless.
CaCO3 + H2SO4 → CaSO4 + H2O + CO2