Planting more trees in cities could help to prevent people dying from increasingly high summer temperatures.
Increasing the level of tree cover from the European average of 14.9% to 30% can lower the temperature in cities by 0.4°C, which could reduce heat-related deaths by 39.5%, according to a new study of 93 European cities.
London has 15.5% tree cover.
Study co-author Mark Nieuwenhuijsen, a researcher at the Barcelona Institute for Global Health, said there was no need for buildings to be razed and replaced with parks, since there is enough space to plant more trees in all the cities the team looked at.
