Reducing fumes from diesel buses.

• Position: Your Life - Brief Article

Interior air pollution from diesel school buses can be cut by 54% or more with the addition of devices such as Diesel Oxidation Catalyst (DOC) mufflers combined with Crankcase Filtration Systems (CFS) and exhaust soot filters, a study by the University of California, Riverside's College of Engineering Center for Environmental Research and Technology demonstrates. To gauge its effectiveness in reducing particulates, the researchers measured the diesel exhaust that students are exposed to on a school bus retrofitted with emission-reduction equipment, and compared it to a conventional school bus with no emission controls.

"The study shows we can install new emission control technology on existing diesel buses to significantly reduce emissions," says Ted Angelo, director of emissions product development, Donaldson Company, Bloomington, Minn. "By retrofitting conventional buses, school districts can greatly reduce emissions, without...