Average temperatures across the country have risen by one degree Fahrenheit.
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Opponents of the climate change ‘theory’â€”that human activity is raising global temperaturesâ€”have an increasingly difficult case to make, in light of recently released scientific evidence.
2012 was the “warmest and second most extreme year on record” for the contiguous U.S., according to data published by the National Climatic Data Center, a branch of the National Oceanic and Atmospheric Administration.