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Articles on Hydrogen

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Green hydrogen has unprecedented support from business and political leaders. But several challenges remain. (Shutterstock)

Why green hydrogen — but not grey — could help solve climate change

Hydrogen could replace fossil fuels, but it’s only as clean as the techniques used to produce it. Almost all production comes from high-carbon sources, but new investments could change that.
Where do the hydrogen and oxygen that make up the earth’s water come from? NASA Goddard/Flickr

Why is there water on Earth?

A recent study shows that the Earth’s water could come directly from the oxygen and hydrogen present in the rocks that formed it, and not from a late supply by asteroids.

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