They were determined using reference prices for fossil fuels and annual average fuel efficiencies for power generation. (iea.org)
It requires manufacturers to improve average fuel efficiency and reduce average greenhouse gas emissions over time. (transportation.gov)
Some of the policies assumed in Scenario 3 include: average fuel efficiency of 77.9 mpg for light - duty vehicles in 2050, 51 percent of electricity produced from renewable sources, cleaner fuels and 1 percent renewable jet fuel by 2015. (newscenter.lbl.gov)