One day in the life of a suffocating planet – as it happened

To kick off a Guardian Cities week investigating air pollution, our reporters followed the sun from Sydney to Lagos to Los Angeles – taking readings, talking to locals and giving a snapshot of our choking citiesThe war against air pollution has begun – and it will be fought in cities 6.04pm GMTWe’ve reached the Pacific Ocean, where air pollution blissfully drops away to near zero.Thanks for joining us for a snapshot of air pollution on this otherwise unremarkable Monday in Febr