The UK has committed to reaching net zero greenhouse gas (GHG) emissions by 2050. Actions to reduce emissions will benefit health by averting some of the anticipated adverse health impacts from climate change and such actions will also have other positive impacts on health or co-benefits. Chapter 14, led by UK Health Security Agency (UKHSA) scientists, with contributions from academics from University College London, University of Exeter and London School of Hygiene and Tropical Medicine, reviews this evidence.