UK regulations now require all new homes to have zero net carbon emissions by 2016 . These are the most ambitious projects in the world , according to Bloomberg . Germany , Sweden and Finland have built more sustainable homes so far , say environmentalists .
UK regulations will require all new homes to have zero net carbon emissions by 2016 . These are the most ambitious targets in the world , according to experts . Germany , Sweden and China have built more sustainable homes so far , say environmentalists .