Chemical changes in the oceans more than 800 million years ago almost destroyed the oxygen-rich atmosphere that paved the way for complex life on Earth, new research suggests.

All over the world, the rate at which humans consume fresh water is now approaching or surpassing the rate at which water sources are being naturally replenished, creating water shortages for people and ecosystems. 

Scientists measure the climate benefits of alternatives to petroleum fuels.

Study uses long-ago record of Bering Strait flooding to understand how ice sheets responded to climate change.

New understanding of modeling soot in the atmosphere underscores the importance of reducing carbon emissions.

Researchers found that African dust has affected local air quality in South Texas in summer and early autumn.

As winds streamed past the South Sandwich Islands, the disrupted flow created an interlocking series of wave clouds.

Caves are easily forgotten when fire rips through the bush, but despite their robustness the long-term impact of frequent, unprecedented fire seasons presents a new challenge for subsurface geology.

As nations prepare to mitigate climate change, decision makers need to understand how land use fits into the climate equation.

CO2 concentrations in the air continue to rise rapidly, and a rapid reduction in man-made emissions is becoming increasingly important.