WASHINGTON, July 19 (UPI) -- Scientists in the United States say hydrofluorocarbons, chemicals credited with helping save Earth's ozone layer, may be contributing to global warming.
COLUMBIA, Mo., Dec. 9 (UPI) -- Oil spray has been found to reduce methane and carbon dioxide from large-scale animal feeding operations, U.S. scientists found.
PALO ALTO, Calif., Jan. 4 (UPI) -- A U.S. researcher has linked increased mortality to higher levels of carbon dioxide in the Earth's atmosphere.
WASHINGTON, Nov. 16 (UPI) -- U.S. officials say efforts to decrease sulfur dioxide emissions from power companies have resulted in a 40 percent reduction since 1990.
WASHINGTON, Oct. 20 (UPI) -- California officials are preparing to file a federal lawsuit against the U.S. Environmental Protection Agency so the state can regulate greenhouse emissions.
WASHINGTON, Aug. 28 (UPI) -- A coalition of environmental groups Tuesday urged the U.S. Environmental Protection Agency to regulate refinery emissions of carbon dioxide.
BILTHOVEN, Netherlands, June 19 (UPI) -- China's 2006 carbon dioxide emissions were 8 percent higher than those of the United States, the Netherlands Environmental Assessment Agency announced Tuesday.
WASHINGTON, Feb. 28 (UPI) -- The U.S. Environmental Protection Agency says greenhouse gas emissions increased by 1.7 percent during 2004 from the previous year.
WASHINGTON, April 8 (UPI) -- The Environmental Protection Agency Friday defended its inability to impose limits on carbon dioxide emissions from cars.
TOKYO, May 10 (UPI) -- Despite Japan ratifying the Kyoto Protocol and reducing greenhouse gases to decrease global warming, Tokyo has decided to not force carbon dioxide cuts.
