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BANNING, CA - DECEMBER 8: Emissions-producing diesel trucks and cars pass non-polluting windmills along the 10 freeway on December 8, 2009 near Banning, California. (Photo by David McNew/Getty Images)
BANNING, CA - DECEMBER 8: Emissions-producing diesel trucks and cars pass non-polluting windmills along the 10 freeway on December 8, 2009 near Banning, California. (Photo by David McNew/Getty Images)
