As Guardian Cities kicks off a week investigating air pollution, join our reporters as we follow the sun from Sydney to Lagos to Los Angeles, taking readings, talking to locals and giving a ‘snapshot’ of one day in the life of our choking cities
We’ve reached the Pacific Ocean, where air pollution blissfully drops away to zero.
Thanks for joining us for a snapshot of air pollution on this otherwise unremarkable Monday in February 2017. The results have been worrying.
We started in Beijing, where we learned that some Chinese have started referring to smog as “the weather” and saw this disturbing video: