Acid rain (acid deposition):SO2 and NO2 gas pollution in the atmosphere is the main reason causing acid rain. As the upper part was presented, the air environment in our country, as a whole, not yet contaminated gas SO2, NO2, SO2, NO2 gas pollution have local properties, so it can be inferred that the source of SO2 and NO2 gas pollution of water has caused the acid rain phenomenon. But can air pollution across the border between the countries, SO2, NO2 pollution of this water can cause acid rain in other countries.
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