HESPERIA, CALIFORNIA, September 18, 2012 (CBSLA.com): A University of California Riverside study found that commercially cooked hamburgers cause more air pollution than diesel trucks. The study, which focused on commercial charbroilers found in burger restaurants, said the equipment generates grease, smoke, water vapors and combustion products, which emit a large amount of particulate matter into the air. "For comparison, an 18-wheeler diesel engine truck would have to drive 143 miles on the freeway to put out the same mass of particulates as a single charbroiled hamburger patty," said Bill Welch, the principle engineer. Researchers also found few regulations for the restaurant emissions. The UCR study is co-funded by the South Coast Air Quality Management District and the San Joaquin Valley Air Pollution Control District.