carbon dioxide

Cutting carbon emissions to zero in the next 30 years would save about 74 million lives this century, a new analysis estimates.

The U.S. is planning to rapidly reduce greenhouse gas emissions. This is America's return to the international climate stage. We break it down for you.

The U.S. plans to reduce greenhouse gas emissions dramatically in the next decade. Scientists say it's crucial that the U.S. succeed. Still, many of the positive effects won't arrive for decades.

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.