BR3: Pollution

- Summary -
There is a lot of causes of pollution in this world. First of all, coal. Every winter many old people and children died from breating problems. Many trees died from the soot form the smoke of factories. New Clean Air laws in Britain said people cannot burn wood in the 1950s. These laws made the air clean. People can breathe safety.
Second, oil. We send out about 450,000 tonnes of lead into the air every year. Half of this lead comes from the waste gases of traffic. People can buy an unleaded petrol car more cheaply than leaded petrol car in many developed comtries.
Third, acid rain. Acid rain is a big problem in many countries. Factories and power stations produce the gases when they burned coal or oil. The gases goes high into the sky by the wind. They come together with water or snow in the air to the ground as acid rain. Many millions of trees have died in Canada and Europe, because of acid rain. Many rivers and lakes have been polluted by acid rain and acid snow from power stations or factories, so fish and other animals cannot live in polluted water. Sweden is a clean country, but most of Swedish lakes are polluted because of acid rain. Acid rain is bad for buildings, too. Acid rain did great damage to many famous and historic buildings. It is a great problem for all over the world. We can clean the smoke from factories, but these activeies's cost is very expensive.
Fourth, water and chemicals. Polluted water kills more than 25 million people every year. Every day, a lot of wastes from houses, farms and factories get into rivers. The waste takes oxygen out of the water, so every animals can't live in the water. Farmers often use chemicals on fruit and vegetables, but some of these chemicals are very poisonous for our bodies. In the past, famers used DDT to kill insects, but DDT is a poison, so many countries forbade using DDT, but every year, chemicals like DDT kill 40,000 people and make a lot of people ill.
Finally, radioactivity. Nuclear power does not use much fuel and prodece smoke and poisonous gases, but nuclear power stations prodece a specila kind of waste. It is a radioactivity. A liitel radiation is OK, many doctors use it, but too much radiation is so dangerous.

After reading this book, I thought pollution is a big problem for all over the world. People must continue to recycle. I think recycling is one of the best way to reduce pollution. Pollution kills people and make people ill every year, so we have to clean the air from now on.
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