carbon dioxide

The global slowdown could create a historic drop in carbon emissions, but it's still not enough to avoid the worst impacts of climate change.

In the search for alternatives to coal and gas, some European countries have turned to a very old fuel. They're importing wood from the United States. Some environmentalists say it makes no sense.

The state of Wyoming, the country's largest coal producer, is the site of the Carbon XPRIZE in which entrepreneurs compete to capture carbon and turn it into commercial products.

William Happer, a Princeton scientist who is doubtful of the dangers of climate change, appears to be leading a White House challenge to the government's conclusion that global warming is a threat.

Our most-read articles gave helpful advice — like how to sit without hurting your back — shocking news and a glimpse of history. And there was one story about — what else? — goats!

The fortuitous dip in emissions of the main greenhouse gas, carbon dioxide, during the past three years is over, as economies turn up. The trend in the near future looks grim, say climate scientists.

Nutrients in crops fall as carbon dioxide rises. People who don't get enough of the right nutrients are more likely to get sick. Researchers have now estimated the effects.

The crash of the space rock that slammed into the Yucatan Peninsula also warmed up the Earth's atmosphere for 100,000 years. And scientists say it's a cautionary tale for people living today.

Scientists found that exposing rice to high levels of carbon dioxide causes it to lose valuable nutrients like iron, zinc, and B vitamins. But some varieties are better at resisting than others.

Since the mid-'90s, levels of crude protein in the plants, which cattle need to grow, have dropped nearly 20 percent, and it may just be a matter of time before prairie grasses can't support grazing.

Seeking to cut greenhouse gas emissions dramatically by 2030, regulators approved a plan that offers incentives for truck and bus fleets to go green and for utilities to use more renewable energy.

Ocean acidification can cause reckless behavior in coral reef fish. But researchers say that coral reef environments have large chemical variations daily, which can offer recovery time for fish.