Lakes and streams can be temporarily protected from acid rain by adding alkaline materials such as limestone (calcium carbonate) or lime (calcium oxide). Liming has been successful on a small scale over the past twenty years on Cape Cod, where fish have been maintained in otherwise acid lakes and ponds;123 it has also been used experimentally in the Adirondacks,124 and in Sweden,125 which is spending 13 million dollars annually on its liming program.
KeywordsCombustion Dioxide Acidity Acid Sulfate Lime
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