"How Green You are".Work on p.156-164.Презентация на тему: " Environmental Problems. " — Транскрипт: 1 Environmental Problems 2 Ecology Ecology is the study that helps to preserve the Earth, its plants and animals. It is also supposed to study the environment and the relationship between human activities and nature. Until recently this relationship was in balance. However, at present times we have to face such ecological problems 3 Pollution is one of the biggest problems. Plants and motor vehicles are number one pollutants. Their harmful emissions pollute the environment. Oil spills and acid rains make the World Ocean dirty. Pollution 4 Global warming is the result of human activity. It is characterized by rising temperatures of the oceans and earths surface causing rise in sea levels and melting of polar ice cover. Apart from that, floods, desertification and excessive snow are also signs of global warming. Global warming 5 Today forests cover about 30% of land. Every year this figure decreases more and more. People clear out new territories for residential buildings, new plants and factories. We must realize that deforestation causes the extinction of animals and plants. Deforestation 6 All the above mentioned ecological problems are the result of mans careless interaction with nature. In my opinion, environmental protection should become of a global concern and serious measures should be taken to create ecological security.