Nitrogen is an important component of the global environment, affecting agriculture, climate, human health, and ecosystems. The role of the nitrogen cycle has become more widely appreciated, yet Earth ...

Nitrogen is an essential element required by all life — vital for plant and animal growth and nourishment. But, an overabundance of nitrogen can cause negative ecological effects. Over the past ...

Nitrogen gets around on Earth. The element moves between the atmosphere, oceans, land, crust, and mantle of the planet. But models of this nitrogen cycle are in need of a major update, a group of ...

THERE is an invisible gas in Earth’s atmosphere that is feeding an environmental crisis. The damage gets worse every year. If things are left unchecked, we are heading for a global disaster. And here ...

A photo of seven American bison grazing in Gardiner, Montana, in front of a stone arch Bison graze near Roosevelt Arch, near the north entrance of Yellowstone National Park, in Gardiner, Montana.