Business Green: The race to develop a US climate change bill entered a new phase yesterday with the release of a discussion draft bill from the House Energy and Commerce Committee that would set even more ambitious emission reduction targets than those being proposed by Barack Obama. The American Clean Energy and Security Act, which has been put forward by senior House Democrats Henry A. Waxman and Edward J. Markey, sets out plans for a nationwide cap-and-trade scheme designed to deliver cuts in …