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Recently, people have been concerned about the problem of global warming.
In the last fifty years the temperature increases a lot. In the coldest areas of the world, winter freezing periods are now beginning later and ending earlier. The climate changes not only threaten people¡¯s survival, but also affect plant and animal life around the world, even some species will disappear.
Greenhouse gases are the main cause of global warming. Human should be responsible for the problem and take measures to slow down global warming. For example, the industries should cut the release of carbon dioxide and other harmful gases.
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