Тема: Экологические проблемы
Environmental problems have become exceptionally acute in the modern world and environmental protection has become a vital necessity for all people.
Our planet is in serious danger. One of the most important environmental problems in the world today is the shortage of clean water. Industrial pollution has made many sources of water undrinkable. Rivers, lakes and even seas have become poisonous. Thousands of fish die every year as a result of the illegal dumping of waste in rivers by factories all over the world.
Lake Baikal is one of the world's largest and most beautiful lakes. It contains a rich variety of fish and plants, including 1,300 rare species that do not exist anywhere else in the world. However, they are being killed by the massive industrial waste, which some factories still pour into the lake every day. A few years ago people thought that the supply of clean water was limitless. Now clean water is scarce, and we are beginning to respect this precious resource. We must protect the clean water that remains for the sake of our children and grandchildren.
Air pollution is another important problem. In hundreds of cities and towns the concentration of harmful substances in the air is over ten times the admissible level. Every day a huge number of plants and factories emit lots of harmful substances into the atmosphere of big cities. The great increase in the use of motor cars in the last quarter of the 20th century has caused an increase in a new kind of air pollution. Pollution from factories and cars poisons the air we breathe and is the main reason for the greenhouse effect and acid rains.
The acid rain can damage life in lakes and rivers and destroy forests. Greenhouse effect may also have disastrous consequences for our planet. It is already affecting several areas of the world with unusual weather causing droughts or heavy storms. The world's temperature is going up and the climate is changing. Cutting down on emissions from large plants and exhaust fumes from vehicles could help solve the problem. I think we should try and use alternative energy such as solar energy and wind energy, and design plants and cars that run on electricity, a much cleaner fuel than petrol.
One of the most alarming environmental problems is depletion of the ozone layer, which protects the Earth from the dangerous ultraviolet rays of the sun. Because of the ozone holes the dangerous rays get through the atmosphere, causing skin cancer and other serious diseases. Many scientists think that these ozone holes are the result of air pollution.
In my opinion, the most urgent ecological problem today is the environmental safety of nuclear power stations. Nuclear pollution can't be seen but its effects can be terrible. We all know how tragic the consequences of the Chernobyl disaster are. Nuclear waste also endangers people's lives. People all over the world protest against nuclear tests and nuclear weapons. If we do not take any action, the possibility of a global nuclear disaster is very real.
Of course, we can't help mentioning such burning issues as destruction of tropical forests and wildlife, overpopulation and shortage of natural resources. The list of serious ecological problems could be continued.
In short, people have destroyed our environment by building huge cities and power stations, developing industries, cutting down trees and excavating mountains. In pursuit of new inventions and discoveries, as well as higher and higher profits, man has forgotten about nature, and it has led him to the edge of ecological catastrophe. Ignorance about ecology may lead to further destruction of nature and worsen living conditions for all living beings.