Over the past 10 years, tons of PM2.5 emitted into the nation’s air have declined 45 percent, while the concentrations people breathe have dropped 33 percent, according to EPA estimates. Much of the credit goes to cleaner diesel engines, mandated by na. . .
WASHINGTON DC -- One of the nation's most proven, cost-effective and successful clean air programs - the Diesel Emissions Reduction Act - is proposed for zero funding in the Obama Administration's new 2015 budget proposal, according to Allen Schaeffer, Ex. . .
The question is what role natural gas will play in the future of trucking, which is today dominated by diesel fuel. While the nation’s truckers will ultimately be the ones to answer that question, according to international and U.S. energy and transpor. . .
"Compared to the vehicles from 1970, today's new vehicles are up to 95 percent cleaner than past models," said EPA SmartWay program director and developer, Cheryl Bynum. "New nonroad engines, such as those used in agriculture that prove important to in. . .