Transportation manufacturer tech Foxx The U.S. has released proposed standards that would help advance the fuel performance of heavy - duty trucks and buses under the Environmental Protection Agency . The standards would start in the 2021 model year and continue through 2027 under plans to try and achieve an overall reduction in green house gas emissions by 26 % . This would include heavy duty vehicles , which account for 20 % of carbon emissions , allowing economy to rise by 2.5 percent a year starting in 2021 .
Transportation Secretary Anthony Foxx The U.S. has released proposed standards that would help advance the fuel performance of heavy-duty trucks and buses under the Environmental Protection Agency. The plans would start in the 2021 model year and running through 2027 under plans to try and achieve an overall reduction in green house gas emissions by 26%. This would require heavy duty vehicles , which account for 20% of carbon emissions, fuel economy to rise by 2.5 percent a year starting in 2021.