U.S. Senate Democrats unveiled an energy bill yesterday that would place more emphasis on conservation and efficiency than the GOP alternative, while keeping the Arctic National Wildlife Refuge drill-free. Currently, about 2 percent of the country’s electricity comes from renewable sources; the new bill would require the number to jump to 12 percent by 2020. Democrats also called for higher miles-per-gallon fuel standards for SUVs, but gave no details. Enviros said the bill was a vast improvement over the GOP one, though they worried that it was too light on specifics. Senate Majority Leader Tom Daschle (D-S.D.) is scheduled to bring the bill up for debate early next year.