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A tractor sprays fertilizer or pesticides on a green field.
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MaYcaL via iStock
Synthetic fertilizer has increased the amount of nitrogen compounds in the biosphere, compounds that must be converted by microbes back into nitrogen gas.

A rare atomic fingerprint reveals how ecosystems clean nitrogen pollution

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Mireia Beas-Moix holding a jar of snakes

Preserving History
Photo of clouds from above

The Physics of Clouds
Yuan Xie

Strength in Numbers
Image of cracked soil

A Perfect Storm

Looking into the Light

The Body’s Transformers