Where+and+how+is+it+formed?

Britain and Northern Europe. Germany, UK, Poland and Spain Norway
 * Where is it having its worst effect? **

Places like power stations, factories and cars produce polluting gases. Most of theses gases (including nitrogen oxides and sulphur dioxides) react with the small droplets in clouds to form sulphuric and nitric acid, then the rain from the clouds fall as very weak acid which is known as acid rain.
 * How is it formed? **

Acid rain is caused by the gases SO2 (sulphur dioxide) and NOX (nitrous oxides). The main sources of SO2 in South Africa are coal-fired power stations and metal working industries. The main sourced of NOX emissions are vehicles and fuel combustions. Sulpher Dioxide reacts with water vapour and sunlight to form sulphuric acid. Just like SO2, NOX from nitric acid in the air. These reactions are'nt slow, it can take hours even days, that pollutes alot of air. Fog droplets can condense and remove pollutants from the air and can become more acid than acid rain. Even snow can be acid!