Thirty years ago it was one of the great environmental issues, along with the hole in the ozone layer and CFC chemicals. Now acid rain may be making a comeback – but this time, there's a change in the chemicals responsible.
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Thirty years ago it was one of the great environmental issues, along with the hole in the ozone layer and CFC chemicals. Now acid rain may be making a comeback – but this time, there's a change in the chemicals responsible.
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