Delayed by a year because of the Coronavirus pandemic, Expo 2020 is ready and waiting. In the city built on sand, 190 pavilions take us back to the future, not only in their contents but in their cutting-edge design; from the Mobility Pavilion by the practice of British super-architect Lord Foster…to the Sustainability Pavilion by Nicholas Grimshaw – whose team has been tackling climate change for years…all entered through carbon-fibre portals, based on traditional Islamic patterns, dreamt up in London by Asif Khan,