"For decades, diesel trucks and buses have spewed large amounts of soot, smog-causing gases and carcinogens into the air. But new diesel engines are more than 90 percent cleaner than a few years ago, far exceeding the emission reductions required by the U.S. Environmental Protection Agency, according to a new independent study released Thursday. Data show new diesel technologies are working even better than expected."
Marla Cone reports for Environmental Health News June 18, 2009
"New Diesels Cut Soot, Smog Over 90%
Source: Env. Health News, 06/19/2009