POLLUTION

- Air pollution : Historically, air pollution comes from factories and means of transport. Factories, power station and cars burn oil and coal. This rises into the air as different forms of sulphur and nitrogen. The sulphur and nitrogen combine with water in the air to make sulphuric or nitric acid. This falls to the ground as acid rain.

We burn large quantities of coal and oil, and this creates millions of tonnes of acid rain. The wind carries the rain long distances, and this creates problems. Onne country makes acid rain, and it falls to the ground in another country, for example, Canada gets a lot of acid rain from the USA, and Norway gets a lot of acid rain from Britain.