California mulls ban on new cars with engines, joining China in climate action

National Plug-In Day 2012: San Francisco, with 60 Nissan Leafs in front of the Golden Gate BridgeWith China mulling an eventual ban on sales of cars with gasoline or diesel engines, the world's largest car market made it clear earlier this month that it intends to force a conversion to zero-emission vehicles. Now California, which has led the U.S. in environmental awareness and emission reduction for decades, is doing the same. Governor Jerry...