Business Green: The EU’s top climate change official yesterday waded into the debate surrounding alleged loopholes in the UN’s Clean Development Mechanism (CDM), arguing that the offsetting scheme needs a "major overhaul". Connie Hedegaard, EU commissioner for climate action, issued a statement indicating the EU could introduce new rules for the bloc’s emissions trading scheme (ETS) that would limit the use of CDM-approved credits issued by controversial projects that aim to curb HFC greenhouse …