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One of the most urgent environmental problems in the world today is the shortage of clean water. Having clean drinking water is basic human right. But acid rain, industrial pollution and garbage have made many sources of water undrinkable. Lakes, reservoirs and even entire seas have become vast pools of poison. Lake Baikal in Russia is one of the largest lakes in the world. It contains a rich variety of animals and plants, including 1,300 rare species that do not exist anywhere else in the world. But they are being destroyed by the massive volumes of industrial effluent which pours into the lake everyday. Even where law existed, the government did not have the power to enforce them. Most industries simply ignore the regulations. The Mediterranean Sea occupies 1% of the world’s water surface. But it is the dumping ground for 50% of all marine pollution. Almost 16 countries regularly throw industrial wastes a few miles off shore. Water is free to everyone. A few years ago people thought that the supply of clean water in the world was limitless. Today, many water supplies have been ruined by pollution and sewage. Clean water is now scarce, and we are at last beginning to respect this precious source. We should do something now. 1. According to the writer, one environmental problem in the world today is ________. A. acid rain B. industrial pollution. C. safe water shortage. D. population explosion . 2. Many sources of water are not drinkable because of _______ . A. acid rain. B. industrial pollution. C. garbage D. all A, B, C, are correct 3. What is serious problem of Lake Baikal in Russia? A. It contains a rich variety of animals and plants. B. It is polluted by massive volumes of industrial wastes discharged into it . C. It has 1,300 rare species that do not exist anywhere else in the world . D. The government did not have the power to enforce laws and regulations. 4. How many countries throw industrial waste into the Mediterranean Sea regularly? A. nearly 16 B. exactly 16 C. exactly 15 D. less than 15 5. What is the message to the reader? A. We should take action to protect our water resources. B. We should take all water resources into account. C. We should limit the use of water resources. D. We should encourage people to use safe water.

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