Due to pollution controls on cars and smokestacks, acid rain has decreased in recent years. This can be seen clearly in Appalachian streams, where aquatic life is thriving. Butthis is leading to increased CO2 levels in the water, as a result of respiration and the organic decay of dead creatures. But more CO2 dissolved in water could lead to a major increase in global warming?if it escapes into the atmosphere.

In LiveScience.com, Sara Goudarzi quotes researcher David DeWalle as saying, “Although that is a positive thing?higher amounts of carbon dioxide in the soil means more of it ultimately may be emitted back to the atmosphere as a greenhouse gas.”

Art credit: freeimages.co.uk

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