The Economist:

IVIA PEDERSEN thought the Nissan Leaf parked outside her favourite lunch spot near Emory University, must be hers. But she could not open the door. Nor could she open the door of the identical Leaf behind it. Cautiously, she tried the third Leaf in line and happily drove away. More than 14,000 electric vehicles are now registered in Georgia; California is the only state with more. But the juicy state incentives for buying them are coming under attack.
 
 Residents can claim an income-tax credit for 20% of the cost of leasing or purchasing an electric vehicle, up to $5,000. Combined with a possible federal tax incentive worth $7,500, savvy Georgians are driving all the way to the bank in nearly-free electric cars. Nissan sells more of its Leaf models in Atlanta than in any other city, according to Don Francis from Clean Cities-Georgia, which promotes the use of cars like these.