The American Clean Energy and Security Act (ACES), also known as the Waxman-Markey bill, narrowly passed in the U.S. House of Representatives at the end of June. The ACES bill seeks to mitigate climate change via emission reductions, investments in energy technology, creation of clean energy jobs, and rigid standards for energy efficiency. Check out Grist for a valuable breakdown of the act.

ACES is far from perfect and required many concessions to pass. But...