Question

Experts have warned about Taj Mahal that:

• A. pollutants in air are discolouring its white marble
• B. pollutants in water are discolouring its white marble
• C. pollutants in land are discolouring its white marble
• D. all of the above

Answer 1

The correct option is A pollutants in air are discolouring its white marble

Experts have warned about the Taj Mahal that pollutants in the air are discoloring its white marble. For example, suspended particulate matter such as soot particles emitted by oil refineries has contributed to the yellowing of marble.

Option $A$ is correct.