Humans have altered the Earth's atmosphere at a rate dozens of times faster than natural climate change

"We are short of carbon dioxide for the needs of the plants," Rep. Jerry Anderson told a House committee

Kennedy has been in the majority in an outstanding number of environmental cases

Researchers monitoring air samples have noticed an alarming observation

Even in America’s least gun-friendly city, a small but steadfast group insists on staying locked and loaded

The path we've chosen to better fuel economy could end up costing the U.S. hundreds of lives each year

Cars are notorious for their environmental harm. Does the steam-powered car of the 1900s pose a possible solution?

Understanding the carbon cycle is crucially important for many reasons

The OCO-2 will help solve a major remaining mystery of global warming

Henry Waxman wants to stop global warming. So why does his legislation explicitly state that greenhouse gases are not pollutants?

Could the same legal strategy that defeated Big Tobacco create a way to address the real costs of gun violence?

Carbon dioxide capture gets serious with a new commercial plant in Switzerland

The country's waste-to-energy program raises some questions

Stratocumulus clouds — the large, blanket-like clouds that cool the Earth — are disappearing as CO2 increases