President Bush signs the Energy Independence and Security Act of 2007, at the Energy Department in Washington on December 19, 2007.

What’s in the new energy law?

• Corporate Average Fuel Economy (CAFE) - Raises average fleet fuel-economy standards for cars and light trucks to 35 miles per gallon by 2020.
• Renewable fuels - Expands the renewable fuels standard to 9 billion gallons in 2008 and increases it to 36 billion gallons by 2022.
• Biofuels – Requires the US to produce 21 billion gallons of advanced biofuels, such as cellulosic ethanol.
• Light bulbs - Increases national efficiency standards of light bulbs by 30 percent and phases out most types of incandescent bulbs by 2012-14.
• Green buildings - Mandates that federal buildings renovated or newly constructed in 2010 reduce their fossil-fuel-generated consumption by 55 percent in 2010 and 100 percent by 2030.