The 2021 report of the Lancet Countdown on health and climate change: code red for a healthy future. Issue 10311 (30th October 2021) - Romanello, Marina; McGushin, Alice; Di Napoli, Claudia; Drummond, Paul; Hughes, Nick; Jamart, Louis; Kennard, Harry; Lampard, Pete; Solano Rodriguez, Baltazar; Arnell, Nigel; Ayeb-Karlsson, Sonja; Belesova, Kristine; et al.