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Mercury
Once on the ground, acid deposition gets into the soil, increasing its acidity, damaging roots, interacting with heavy metals in the soil, and causing toxins, such as soluble aluminum, to be absorbed by vegetation. More devastating is soluble aluminum entering trout streams, killing fish by damaging their gills, destroying their circulation system.
Paine Run at the southern end of the Shenandoah National Park and on the western side of the Blue Ridge is on course of becoming a dead stream unless acid deposition from coal-fired power plants is not reduced by 70 percent. The thin soil in that area, and its bedrock (Siliciclastic), lacks any ability to neutralize acidity, com
97.4%