On Friday, the California Air Resources Board will decide whether to adopt its “scoping plan” for the implementation of AB 32, the 2006 anti-global warming law. It requires state energy suppliers to use far more power from cleaner but more costly sources. Given that this would impose unique burdens on California businesses, many observers (including this editorial page) have been skeptical and said a national or international approach to global warming makes more sense. The response from Gov. Arnold Schwarzenegger has been that the opposite is true: Far from burdening the economy, the forced transition to new sources of power...