The National Commission on Energy Policy reported in December that, if fleet mileage in the U.S. rises to 40 mpg — somewhat below the current European
Union fleet average for new vehicles of 42 mpg and well below the current Japanese average of 47 mpg - then as switchgrass yields improve modestly to around 10 tons / acre it would take only 30 million acres of land to produce sufficient cellulosic ethanol to fuel half the U.S. passenger fleet.
Not exact matches
Each year, the
Union of Concerned Scientists (UCS) gives environmental scores to automakers based on
average per - mile smog pollution and global warming emissions of the entire
fleet of vehicles sold.
Better vehicle fuel efficiency standards: The European
Union's fuel efficiency
fleet average for new cars now stands at 41 MPG, and is rising steadily.