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The article reports on new regulations that have been passed by the California Air Resources Board in June 2008, which will require all new cars sold within the state to carry an Environmental Performance label ranking the global warning emissions of the vehicle. Vehicles with fewer climate changing emissions like hybrid cars will receive a higher score, and this in turn, will be added to a smog score that has been on cars in California since 1998. To acquire the global warming score, the greenhouse gas emissions produced by the vehicle and the production of the fuel it uses will be considered.