Add Yahoo as a preferred source to see more of our stories on Google. CO2 levels are altering the chemical makeup of human blood over time, and may lead to health problems down the road. | Credit: ...

(DAVID MCNEW/GETTY IMAGES NORTH AMERICA/Getty Images via AFP) The increase in the amount of carbon dioxide in the atmosphere last year was the biggest ever recorded, the United Nations said Wednesday, ...

GENEVA (AP) — Heat-trapping carbon dioxide levels in the atmosphere jumped by the highest amount on record last year, soaring to a level not seen in human civilization and “turbo-charging” the Earth’s ...

Carbon dioxide emissions from human activities and wildfires rose last year, while the land and oceans’ ability to absorb carbon diminished, leading to a record surge in the amount of the ...

Hawaii’s Mauna Loa Observatory just captured an ominous sign about the pace of global warming. Atmospheric levels of planet-warming carbon dioxide aren’t just on their way to yet another record high ...

Duke University's recent forest experiment revealed that loblolly pine plots exposed to elevated carbon dioxide levels ...

According to new data, the amount of CO2 in the atmosphere has risen to an all time high - and the rate of increase may be accelerating. Gland, Switzerland - According to a report in New Scientist, ...

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 ...

Li Cohen is a senior social media producer at CBS News. She previously wrote for amNewYork and The Seminole Tribune. She mainly covers climate, environmental and weather news. "Over the past year, ...

The levels kept rising even when no one was in the room.

GENEVA (AP) — Heat-trapping carbon dioxide levels in the atmosphere jumped by the highest amount on record last year, soaring to a level not seen in human civilization and "turbo-charging" the Earth's ...