Business Green: The government has insisted it remains “absolutely committed” to legislation that require all new homes built from 2016 to be zero-carbon, despite reports today that so far only 15 new homes have qualified as zero-carbon. Under a scheme first unveiled in 2006, buyers of new zero-carbon houses and flats would be exempted from stamp duty, saving purchasers around £15,000. But according to reports in today’s Times, only 15 homes have qualified as zero-carbon in the first year of …