Coal impoundment ponds (where coal is washed after it is mined) contain dangerous heavy metals such as mercury and lead.

Name: Coal impoundment ponds (where coal is washed after it is mined) contain dangerous heavy metals such as mercury and lead.
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Coal impoundment ponds do contain dangerous heavy metals such as mercury and lead, as well as other pollutants like arsenic and selenium. These pollutants can leach into groundwater and pose a threat to human health and the environment.

Coal Impoundment Ponds (Where Coal Is Washed After It Is