“…17 Why not, as the World Health Organization’s Maria Neira argues, see the climate emergency as the ultimate health opportunity?18 With that mindset we might take action not only in healthcare settings but in other sectors that influence the health of people and planet, such as transport and housing (doi:10.1136/bmj.p2211 doi:10.1136/bmj.p2235). 519 We might realise that investing in local communities reduces healthcare costs (doi:10.1136/bmj.p2239). 20 We might then have a better appreciation of the influence of climate change on a person with asthma walking in a polluted city (doi:10.1136/bmj.p2144) or someone struggling in hot weather with the adverse effects of antipsychotic drugs (doi:10.1136/bmj.p2199).…”