LONDON, Nov. 11 (UPI) -- U.S. climate scientist Ken Caldeira of the Carnegie Institution has told the British Parliament the world needs a carbon dioxide emergency backup plan.

THE DALLES, Ore., June 6 (UPI) -- Increased carbon levels in ocean water could have devastating impacts on marine life, scientists testified Thursday at a congressional hearing.

STANFORD, Calif., April 17 (UPI) -- U.S. scientists say changes in the Earth's jet streams, possibly caused by global warming, might affect storm paths and intensity, including hurricanes.

WASHINGTON, March 11 (UPI) -- Two studies by U.S. researchers suggest carbon emissions have to end completely within this century to avert dangerous global warming.

WASHINGTON, Sept. 20 (UPI) -- An international team of scientists determined ocean carbon dioxide levels might exceed U.S. Environmental Protection Agency standards by mid-century.

CHAMPAIGN, Ill., March 22 (UPI) -- A U.S. study suggests ocean acidification changes from CO2 emissions are mostly independent of any temperature increase caused by the emissions.

HONOLULU, Feb. 20 (UPI) -- Earth's oceans may soon become more corrosive than they were when the dinosaurs died if the world's carbon dioxide emissions are not reduced.

SAN FRANCISCO, Dec. 6 (UPI) -- A study by the Carnegie Institution and U.S. government scientists says planting trees to absorb carbon dioxide may worsen global warming.

LONDON, June 30 (UPI) -- Britain's Royal Society called Thursday on Group of Eight leaders to quickly cut carbon dioxide emissions that may make the oceans dangerously acidic by 2100.