Diesel Fumes More Polluting Than Gas, New California Study Finds

A chemical analysis of air samples taken from California’s San Joaquin Valley and an Oakland traffic tunnel show that diesel fuel emissions are more polluting than previously thought, according to researchers. In the University of California at Berkeley study, authors wrote that diesel exhaust is seven times “more efficient” at forming aerosol than gasoline exhaust. In the United States, diesel fuel accounts for 21% of on-road fuel use, according to study authors. In California, the diesel share of on-road use ranges from approximately 10% in coastal cities to more than 30% in agricultural regions. To read the abstract, click here.