Weirdly, climate change has barely factored into any of the whirlwind announcements emerging from Andy Burnham, our new prime minister, in the last two weeks. A paltry reduction of VAT on energy bills to deal with rising energy prices - and a resumption of drilling in the North Sea. Everyone talks about the elusive idea of ‘net zero’. Conservative and Reform positions are to abandon net zero, alleging that it is these targets that are responsible for our higher energy bills. The government’s Climate Change Committee (CCC) estimates that achieving net zero would cost about £26bn a year, without giving a specific figure for housing.