Beginning next year, all new vehicles sold in California must display window labels that rate the environmental performance of the car or truck.

The stickers will carry scores, from 1-10, based on how much the vehicles contribute to global warming and smog. The lower the scores, the worse the performance. The average new vehicle will get a 5 on both scales. The cleanest vehicles will get 10s.

The labels also urge drivers to: "Protect the environment, choose vehicles with higher scores."

All new vehicles sold in the Golden State must display them by Jan. 1.

"This label will 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," said Mary Nichols, chairwoman of the California Air Resources Board. "Consumer choice is an especially powerful tool in our fight against climate change."

Source: Detroit News
California requires automakers to produce some ultra-clean vehicles, known as partial zero emission vehicles, to comply with its clean air rules.