Acid rain is caused when the air is polluted by which gases ________

Unpolluted rain water has a pH of about 5.5. Acid rain has been shown to have a pH as low as 3.0. Calculate the [H⁺] ratio of acid rain to unpolluted rain.

Acid rain is caused in part by burning coal thatcontains sulfur impurities. The sulfur is converted first toSO₂, which reacts with oxygen and atmospheric moistureto produce sulfuric acid, H₂SO₄. If aparticular coal contains 1.85% sulfur (by mass), calculate the massof sulfuric acid produced by burning a metric ton (1000 kg) of thecoal.