After four years out of Vietnam, I have finally returned "home" to Saigon. There have been much changes to the city. Development seems quite higher than when I first left in 2013. You see new apartment buildings and shopping centers across the city. More cars and motorbikes clog the streets. More factories have moved from China to Vietnam due to lower labor costs. Vietnam also … [Read more...] about Cleaner Indoor Air in Saigon (Vietnam)