Singapore, the green city Although Singapore has witnessed record-breaking heat this year – with temperatures not seen for 40 years – its residents have suffered little from it, since the southeast Asian city has adapted successfully to global warming. The city-state champions natural ventilation, tree-lined streets and more energy-efficient buildings. This policy is supported at the highest levels of government, making Singapore the greenest metropolis in the world and a laboratory for the city of the future. Our correspondent reports.