Rain is one of the most essential ingredients for human and animal life. The water provided by rain allows all life on Earth to survive. Although rain is naturally acidic, it is being increasingly acidified by pollution from homes, factories, power stations and cars. The term used to describe this problem is “acid rain”. Acid rain hasn’t just occurred in the last twenty to thirty years. In fact a chemist named Robert Smith found rainfall in Manchester, U.K., to be very acidic. He suggested a link between acid rain and SO2 given off when coal was burnt by local factories. This was over 100 years ago.
Acid rain is caused when pollutants from cars, homes, factories and power stations mix with atmospheric moisture. These pollutants may be carried in clouds for long distances before falling, which means that forests and lakes far away from factories may be damaged by acid rain….