The Mayor is working hard to tackle the causes of climate change and ensuring London can adapt to a changing climate. Find out more about the work he's doing. Zero Carbon London The Mayor has set ambitious aims for London to be a zero carbon city by 2050. Climate adaptation London’s climate is changing. We’re having hotter, drier summers and warmer, wetter winters. Climate Action Week London's first Climate Action Week was held on July 2019, bringing together London's climate leaders and organisations. Related content Environment Strategy The Mayor's plans to make London greener, cleaner and ready for the future. Energy for Londoners The Mayor's programme to make London's energy cleaner and more affordable. Cleaner Heat Cashback With Cleaner Heat Cashback SMEs are now eligible for up to 40% cashback on energy efficient heating improvements. Environment newsletter Sign up now to receive updates on environmental policy, projects, events and opportunities.