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Mercury

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Mercury

Mercury

Mercury

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  • <iframe src="https://www.npr.org/player/embed/1128129/128129" width="100%" height="290" frameborder="0" scrolling="no" title="NPR embedded audio player">

NPR's John Nielsen has a report on the high levels of mercury discovered in the smoke from this summer's wildfires. Scientists say the fires are a major source of mercury pollution but they're not sure where the mercury comes from before it goes up in smoke. Paradoxically, the findings could make it difficult to force electric power plants to limit mercury emissions from their smokestacks.