The legislation calls for reducing the amount of greenhouse gases created in the state to 1990 levels by the year 2020.
That goal of emitting about 15 million tons of greenhouse gases a year would be 15 percent less than what is currently created, and 25 percent less than the state would be expected to emit by 2020 if the current upward trend continues.
Gov. Linda Lingle has until July 10 to decide whether to sign the bill, let it become law without her signature or veto it.
California was the first state to pass a law with a GHG cap.