The Antarctic ozone hole reached its annual maximum on Sept. 12, 2008, stretching over 27 million square kilometers, or 10.5 million square miles.

The amount of methane in Earth's atmosphere shot up in 2007, bringing to an end approximately a decade in which atmospheric levels of the potent greenhouse gas were essentially stable.

NASA satellite data can improve forecasts of dust storms in the American Southwest in ways that can benefit public health managers. Scientists announced the finding as a five-year NASA-funded project nears its conclusion.

New research indicates a powerful greenhouse gas is at least four times more prevalent in the atmosphere than previously estimated.

When Jeffrey Sachs speaks of poverty, he's not talking about a hungry waif in New York or a homeless person in Chicago.

Scientists hope a new NASA mission will help them better understand how Earth's ocean swallows the bitter pill known as carbon dioxide.

A new look at a classic experiment reveals volcanoes may have played a crucial role in the rise of life on Earth.

A NASA/university team has published the first global satellite maps of the key greenhouse gas carbon dioxide in Earth's mid-troposphere, an area about 8 kilometers, or 5 miles, above Earth.

An asteroid measuring several feet in diameter is expected to enter the atmosphere over northern Sudan before dawn Tuesday, setting off a potentially brilliant natural fireworks display.

A NASA study shows that the rising frequency and intensity of arctic storms over the last half century directly accelerated the rate of arctic sea ice drift which is a harbinger of climate change.