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Environmental Protection Daily Post – October 09: Reward for participation; an additional 5 rewards for answering 3 questions correctly

2016-10-09View Original

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Multiple-choice question: The main source of pollution that damages the ozone layer is ( ). A. Factories and household stoves burn fossil fuels. . B. Vehicle exhaust. . C. Exhaust gases emitted by the non-ferrous metal smelting industry. . D. Fluorocarbon compounds released by refrigerators and air conditioners widely used in industry and households. D

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