Hugh Pickens writes "New cars and trucks will have to get 30 percent better mileage starting in 2016 under an Obama administration move to curb emissions tied to smog and global warming. While the 30 percent increase would be an average for both cars and light trucks, the percentage increase in cars would be much greater, rising from the current 27.5 mpg standard to 42 mpg. Environmentalists praised the move. Carl Pope, executive director of the Sierra Club, called it 'one of the most significant efforts undertaken by any president, ever, to end our addiction to oil and seriously slash our global warming emissions.' Obama's plan also would effectively end litigation between states and automakers that had opposed state-specific rules, arguing that having to meet several state standards would be much more expensive for them than just one federal rule. The Detroit News reported that automakers were on board with the new rule and had worked with the administration on creating a timeline for the transition." There's a case to be made that raising the CAFE won't save oil or reduce greenhouse gases.