WASHINGTON (AP) -- The Energy Department reports U.S. greenhouse gases emissions increased last year by 1.4 percent after a decline in 2006.
The report Wednesday said carbon dioxide pollution from burning of fossil fuels rose by 1.3 percent in 2007.
The report attributed the increase to colder winter weather and a warmer summer that required more fuel burning for heating and electricity to run air conditioners.
Greenhouse gas emissions have increased an average of just under 1 percent a year since 1990.
A decline in emissions in 2006 also was attributed to weather that reduce the demand for heating and cooling that year.
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