Officials in Richmond, a London suburb with few provate garages and driveways, are basing annual parking fees on how much carbon dioxide a car emits, AP reports. The biggest polluters will pay $590 a year for a permit to park on the street. 

Cars with smaller engine sizes will receive a 50 percent discount on the current $195 cost of a parking permit. 
 
The charges will come into force in May. Nine other councils, including one for central London, have expressed an interest in similar plans.