diesel

(Newser) - San Francisco may have the biggest green fleet in America now that all 1,500 diesel vehicles—including ambulances, fire engines, buses and street sweepers—run on B20, a combination of soy-based and diesel fuels. The transformation is part of the city's plan to  reduce toxic emissions to 20% below...

(Newser) - Two corporate giants are teaming up to produce biofuels and boost their bottom lines. Tyson Foods, the world's biggest meat producer, and third-largest U.S. oil company ConocoPhillips will be using about half of Tyson's animal fat to make a renewable diesel fuel, which will account for about 3% of...