(Washington DC) President Obama says he's going to direct the Environmental Protection Agency and the Transportation Department to issue a new round of fuel-efficiency standards for medium- and heavy-duty vehicles by March 2016. Iowa Senator Charles Grassley says every little bit helps.
"When you got to semi's and other heavy trucks, going from 6 miles to 6.5 miles is quite an accomplishment."
Grassley couldn't say whether the initiative would mean an increase in the use of renewable fuels.
Iowa Radio Network