With nearly nine million inhabitants, London is the highest-performing megacity on the 2022 index. London is a leader among European cities in the number of sustainable policies it has enacted and its climate change resilience. With historic green spaces like Regent’s Park and Hyde Park, the City of London is one of the cities with the most open public space in Europe in the 2022 index universe. Londoners are also among the lowest water consumers and solid waste producers per capita in Europe.