Pollution is complicated because it is caused by things that can’t benefit people.

III. Read the following passage. Decide if the statements from 17 đồ sộ trăng tròn are True or False, and choose the correct answers (A, B, C or D) for question 21 and 22.

Everyone wants đồ sộ reduce pollution. But the pollution problem is as complicated as it is serious. It is complicated because much pollution is caused by things that benefit people. For example, exhaust from automobiles causes a large percentage of all air pollution. But the automobile provides transportation for millions of people. Factories discharge much of material that pollutes air and water, but factories give employment đồ sộ a large number of people.
Thus, đồ sộ kết thúc or greatly reduce pollution immediately, people would have đồ sộ stop using many things that benefit them. Most of the people tự not want đồ sộ tự that, of course. But pollution can be gradually reduced in several ways. Scientists and engineers can work đồ sộ find ways đồ sộ lessen the amount of pollution that such things as automobiles and factories cause. Governments can pass and enforce laws that require businesses and traffic đồ sộ stop, or cut down on certain polluting activities.

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