Why aren’t there Global Warming Scores for older vehicles?
The requirement for Global Warming Scores to be posted on vehicles didn’t come until the passage of Assembly Bill 1229 in 2005. AB 1229 required the California Air Resources Board (ARB) to redesign the Smog Index Label that had been appearing on vehicles since 1998. The redesign of the Smog Index Label resulted in a new label, called the Environmental Performance Label, that includes two separate scores – one for Smog emissions and another for Global Warming emissions. The Environmental Performance Label is required to be affixed to the window of every new vehicle beginning with the 2009 model year. The higher the score, the cleaner the vehicle.
