Why do politicians have such trouble sticking to their environmental promises? Why are they happy to hug a husky one minute, desperate to ditch the 'green crap' the next?As Labour ditch their £28bn commitment to green the economy, Tom Heap and Helen Czerski are joined by a panel of insiders to analyse the electoral gains and costs of environmental policies and consider the best strategies to maintain the focus of those in power on the greatest challenge to the planet. Sophie Howe was the Future Generations Commissioner of Wales, charged with ensuring that government policies did no harm to the unborn citizens of Wales. Her pressure helped put a stop to a new motorway in South Wales and supported the government's virtual moratorium on road-building and 20mph zones in built-up areas. Tara Singh is a public affairs advisor with the PR company, Hill and Knowlton. She was a government advisor at the time that Prime Minister David Cameron cancelled commitments on home insulation and put a stop to new onshore wind farms in England. Professor Colin Davis holds the chair in Cognitive Psychology at Bristol University. He has taken part in Extinction Rebellion protests and has a particular interest in the psychological factors that prevent politicians and the public acting against climate change. Produced by Alasdair Cross for BBC Audio Bristol in conjunction with the Open University.