6th grade. Unit 7. Nature protection

 

Nature Protection

The Earth is the only planet in our solar system where there is life. You can see blue rivers, lakes, seas, oceans, green fields and forests, snowy mountains, many birds and animals. The nature around us is the environment. Many centuries ago people lived in harmony with nature. But development of science and technological progress influenced the world.

The most serious ecological problems are: water pollution, air pollution, destruction of the ozone layer, acid rain, destruction of tropical forests.

There is no ocean or sea which is not polluted. Many ships sail in the oceans and pollute them. Factories and plants throw poisonous industrial waste into water. Some seas and oceans have suffered after nuclear tests. Many birds and fish die because of the polluted water.

The second important problem is air pollution. Cars, buses, plants and factories pollute the air we breathe. People in big cities suffer from noise and smog. Harmful gases destroy the ozone layer which protects our planet from the dangerous light of the sun.

There are holes in the ozone layer and the sun radiation gets to the Earth and can cause skin cancer. Burning coal and oil leads to global warming and changes in the world's climate.

Acid rain contains acid from factory smoke and destroys trees, rivers and buildings.

One more problem is destruction of tropical forests. These forests produce oxygen we need. People cut down forests and we have less oxygen. Many animals and birds disappear, the world's weather is changing.

Many people try to stop pollution and protect nature. There are some things we can do. We should plant trees and flowers, we mustn't throw rubbish in the streets and forests. People can recycle things and use alternative forms of transport and energy.