Question

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Answer 1

1. The problem of pollution has become more and more dangerous with the development of overcrowded citiws.
2. Acid rains, global warming, air and water pollution and overpopulation are the problems that threaten human lives.
3. Because the pollutants in air harm our respiratory system.
4. Yes, because the polluted air poisons our body.
5. The burning of fuel and fossil fuels produses odourless, colourless but poisonous gas.
6. Among the most dangerous pollutants are carbon monoxide, nitrogen oxides, sulfur dioxide, and ozon or active oxygen.
7. The chemical emissions from factories are the main reason for greenhouse effect and acid rains.
8. To help saving the planet, we can plant trees and create parks for endangered species; we can recycle our wastes and persuade enterprises to stop polluting activities.