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

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

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

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...