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http://www.centralvalleybusinesstimes.com/stories/001/?ID=32182

Researchers find a human touch to torching mammoth fires •  There cannot be a fire without a spark Humans have dramatically increased the spatial and seasonal extent of wildfires across the U.S. in recent decades and ignited more than 840,000 blazes in the spring, fall and winter seasons over a 21-year period, according to new research led by the University of Colorado at Boulder.