You worrying about the air quality there, CT? Now listen to this! LOL
In my younger years, I had a chance to visit Dhaka for business purposes.
I always try out local food, you know... must-eat places where local people go, sort of gastroventure whenever I go to a foreign city/town.
I had the worst diarrhea of my whole life for the entire period of my sejourns there. I got into this series of vicious cycles as the more water I drank to prevent dehydration, the worse diarrhea got! In a word, it was just horrible!