20 July 2020 by Keerthana-Vedachalam
Air pollution in many UK cities has halved since the country entered lockdown to tackle the coronavirus pandemic, and the story has been mirrored around the world.
In India, Delhi is usually the world’s most polluted city, but it has recently seen some of the freshest air in decades. Similarly, in cities such as Bangkok, Beijing, São Paulo and Bogotá, where coronavirus restrictions have been imposed, all have reported an unprecedented decline in pollution.