Do you like the acronym? The northeastern states agreement, RGGI, is pronounced "reggie." I'm pronouncing GWSA "gow-say." Catchy, huh?
From the WSJ (CA pact ... $$$), information about the abatement target:
... California will mandate a reduction in the state's emissions of gases contributing to global warming to 1990 levels by 2020. The cut would target the state's biggest industrial emitters of greenhouse gases, such as power plants, oil refineries and cement factories. California already has passed a law requiring greenhouse-gas-emission cuts from cars and light trucks sold in the state.
/.../
California's goal is less ambitious than the cut envisioned in the Kyoto Protocol. Industrialized countries that ratified Kyoto have pledged to reduce their global-warming emissions a collective 5% below 1990 levels between 2008 and 2012. The U.S. has declined to ratify Kyoto, saying it would hobble the nation's economy. California's goal equates to cutting its emissions by 25% in 2020 below the level the state projects it would otherwise reach that year.
GWSA is less ambitious than Kyoto, sure, but not by much.