What gasses make up acid rain?

Most of what is termed as Acid Rain contains Sulphuric Acid, this is formed by a combination of Hydrogen Sulphide, Sulphur Dioxide and water. Answer: Acid precipitation is formed when sulfur oxides (SOx) and nitrogen oxides (NOx) are absorbed by water droplets. This forms sulfurous/sulfuric and nitrous/nitric acids. Some of the sulfurous acid can be transformed into sulfuric acid. The chemistry:

Sulfur dioxide and water form sulfurous acid (H2SO3)

SO2(g) + H2O(l) <--> H2SO3(aq) In some cases sulfur dioxide (SO2) oxidizes to sulfur trioxide (SO3)

2SO2(g) + O2(g) -> 2SO3(g) The sulfur trioxide (SO3) then combines with water making sulfuric acid (H2SO4)

SO3(g) + H2O(l) -> H2SO4(aq) Some oxides of nitrogen like nitrogen dioxide (NO2) react with water to form nitrous acid (HNO2) and nitric acid (HNO3)

2NO2(g) + H2O(l) -> HNO2(aq) + HNO3(aq)