Dirt is one of your strongest first impressions: the smell of raw sewage, garbage piled on street corners, a griminess about most objects in public-places, people urinating on the street, air pollution which not only burns your eyes and nostrils but sometimes significantly reduces driving visibility, the red stains in stair wells where people have spit while chewing pan and betel nut, and, perhaps most of all, the social dirt—beggars, and colonies of shacks where thousands live with an absence of even the most essential amenities.