Saw this photo of people cleaning the soot off the wall of a typical building in Manhattan – man, that sure is hell lot of dirt/grime/dust. Not quite as artistic as the time where a graffiti artist used the dust for artistic/commercial purposes, but certainly almost as astounding. I’m sure it’s not just Manhattan, but practically any major metropolitan in the world. For years, people have turned a blind eye to pollutions in cities, taking them as a necessary chip for economic advancements. With the recent report on expats leaving Hong Kong for cleaner air elsewhere, it’s about time to realise that, hey, the environment does play an important role even if you just want to plainly look at the numbers.