William & Mary Environmental Law and Policy Review
Abstract
Thirty states now have renewable portfolios standards that require generators of electricity to increase their use of renewable energy. Originally intended to promote “energy independence” and other environmental goals, today the programs are among the few U.S. programs which respond to the threat of global warming. This article considers how they work and whether they are effective. It concludes that, in the absence of comprehensive international or federal greenhouse gas controls, renewable portfolio standards are an effective and productive means to retard global warming.