Senate Democrats unveiled a comprehensive energy proposal this week. "Energy Development for a Growing Economy" aims to promote energy independence by increasing the use of renewable fuels. The proposal would give the president authority to increase the renewable content of motor fuel to 25% by 2025. In addition, 25% of vehicles sold in the U.S. would run on ethanol, biodiesel or alternative fuels by 2010. The proposal also would require 10% of electricity in the U.S. come from renewable resources by 2020. -- P. Scott Shearer, Washington, D.C., correspondent