Acid rain affects the root systems of trees, which makes it difficult for the trees to get the nutrients they need to grow. The trees eventually get 'sick' and die. When we burn fossil fuels, sulfur dioxide and nitrous oxide are released into the atmosphere, which is a main cause of acid rain. Burning less fossil fuels is a good place to start trying to lessen the amount of acid rain we get, and so is cleaning coal before burning it.
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