When the pH of the rainwater drops below , it is called acid rain.
“Acid rain refers to the ways in which acid from the atmosphere is deposited on the earth’s surface.”
Acid rain harms trees, crops, and plants by dissolving and washing away nutrients required for growth.
Buildings and other structures composed of stone or metal are harmed by acid rain.
Marble cancer
Pollutants in the air, such as Sulphur dioxide and Nitrogen dioxide, react with water vapour in the atmosphere to produce Sulphuric acid and Nitric acid, respectively.
These acids react with rain, causing it to become acidic.
Marble cancer is a phenomenon caused by acid rain corroding building materials like marble.
So, the phenomenon of marble cancer is due to acid rain.