Reply To: Cleaner Air Petition and WebsiteHome Concrete and Conservation Pollution Cleaner Air Petition and Website No title 6 March 2007 at 7:46 pm #8011 Dusty MopAccording to the latest HK census report, the “caucasion” population (and by that I think they mean “western expats”) has dropped by 20% in the last few years. I wonder to what extent the air pollution was responsible for the exodus?