In it's efforts to reduce pollution and raise awareness, Californian politians are preparing to introcuce "global warming" stickers, to be displayed on the number plates of all new cars.
The stickers will display a "smog score" out of ten, with the most environmentally scoring 10, and the worst polluters given a 1.
It is hoped that displaying this score on vehicle number plates will further stigmatise drivers of "gas guzzling" vehicles and increase pressure on motorists to buy more fuel efficient cars.
The chairwoman for the California Air Resources Board, Mary Nichols, said that the aim of the label is to "arm consumers with the information they need to choose a vehicle that saves gas, reduces greenhouse gas emissions and helps fight smog all at once".
The scheme was passed in June this year, and will be made compulsory in January. However, it is expected that new cars will begin to adopt the scheme in the meantime.
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