(06/19/15) ATLANTA – The U.S. Environmental Protection Agency (EPA) and the Department of Transportation’s National Highway Traffic Safety Administration (NHTSA) are jointly proposing standards for medium- and heavy-duty vehicles that would improve fuel efficiency and cut carbon pollution to reduce the impacts of climate change, while bolstering energy security and spurring manufacturing innovation
Source:: http://yosemite.epa.gov/opa/admpress.nsf/0/DCF6FEF454D171BC85257E6900515F3C