Acid rain can be reduced by decreasing emissions. By reducing emissions, SO2 and NOx levels will decrease. Emission controls such as the Clean Air Act have dramatically decreased air pollution, resulting in the decrease in acid rain occurrences. Liming is a temporary solution to acidic bodies of water. Limestone is known to raise pH levels and eliminate some acidification symptoms. This process is expensive and temporary but can help restore aquatic life.
Source: Acid rain and its ecological consequences
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