Q22
General ScienceEnvironment & Ecology
Stone cancer occurs due to
- a.Frost damage
- b.SPM
- c.Acid Rain
- d.Higher VOC level
Answer: (C) Acid Rain
'Stone cancer' is the corrosion and pitting of marble and limestone monuments, such as the Taj Mahal, by acid rain: sulphuric acid reacts with calcium carbonate. SPM causes yellowing or blackening rather than this decay, and frost or VOCs are not the cause named by the term.