ELIZABETH, NJ – FEBRUARY 23: Trucks and cars drive down the New Jersey Turnpike February 23, 2005 in Elizabeth, New Jersey. According to the Clean Air Task Force, an average of 2,729 early deaths from diesel engine pollution occur per year in the New York metropolitan area, the highest rate in the nation. According to the report, diesel exhaust causes over 20,000 early deaths nationwide a year. (Photo by Mario Tama/Getty Images)