Guardian: The government’s zero carbon homes initiative is in danger of being “devalued” say campaigners who have previously lauded the scheme as pioneering. They say the definition of zero carbon risks being diluted in the face of the worst economic conditions for housebuilding since the 1920s. However, launching a government consultation on the definition of zero carbon today the housing minister Margaret Beckett said despite the economic crisis she was “absolutely committed to our 2016 …