Tuesday, May 18, 2021
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Is coal clean? The president says it is.

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Coal's not as clean as Pres. Trump tried to convince us it was, but we're making progress in cutting some pollutants from coal.

Identifying renewable output anywhere on Earth

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University researchers have developed a tool that can predict savings from renewable energy resources anywhere. What would it be near your school?

Differences between active and passive transport

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We have this problem: Many organisms acquire necessary nutrients, such as minerals, in the form of ions, by transporting these chemicals into cells against the...