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1. Write a chemical reaction showing how the following gases make rain acidic: carbon dioxide, sulfur dioxide, nitrous oxides. [6 marks] 2. Why does coal contain sulfur impurities? [3] 3. Nitrogen oxides are factors in both acid rain and smog formation. A reduction in nitrogen oxides is needed. Research and come up with a personal action plan that you could follow to help cut down on emissions of this dangerous gas. [6 marks]