Q1. Taj Mahal is reported to be in danger because of
(a) Water pollution in Jamuna
(b) Stealing of marble bricks
(c) Decay of marble due to its age factor
(d) Air pollution due to nearby industries
(UPSC Prelims 1984)
Answer: (d) Air pollution due to nearby industries
Explanation: Air pollution, especially from industries near Agra, releases sulphur dioxide and other pollutants that react with moisture to form acid rain, which causes the marble of the Taj Mahal to deteriorate. This has raised concerns about preservation of the monument.