An observatory high on Hawaii's Mauna Loa volcano that measures carbon dioxide in the atmosphere has reported its highest ever seasonal peak concentration of the greenhouse gas. For the first time, ...

Rising carbon dioxide levels are heating the planet but may also have an alarming, invisible impact on the human body, ...

The levels of the crucial heat-trapping gases in the atmosphere reached historic highs last year, growing at near-record fast paces, according to the U.S. National Oceanic and Atmospheric ...

Add Yahoo as a preferred source to see more of our stories on Google. Smoke and haze over New York City is seen from the observation deck of the Empire State Building due to wildfires in Canada on ...

"Carbon dioxide remains in the atmosphere for centuries and in the ocean for even longer. The last time the Earth experienced a comparable concentration of CO2 was 3-5 million years ago, when the ...

Earth’s atmosphere now has more carbon dioxide in it than it has in millions — and possibly tens of millions — of years, according to data released Thursday by the National Oceanic and Atmospheric ...

The level of carbon dioxide in the atmosphere reached a record-breaking high last year, according to a new report. The report out Wednesday from the United Nations World Meteorological Organization ...