Changing the habits of an entire culture is going to be a very slow process.
I read somewhere (probably FR) that in India, they’ve finally begun to convince people to use indoor plumbing. They were told that it would help health, but still didn’t do it.
What changed things, was the women were tired of running the risk of being molested every time they went outdoors to do their duty. When they finally saw the safety aspect of indoor plumbing, they started using it. Of course, once you get used to it, going outdoors quickly loses its appeal. There’s a lot to be said for comfort and safety, not to mention, convenience. ( I’ve done my share of camping.)
Indeed. A friend of mine made a documentary in Bangladesh. One of his most impressive shots -- he's very good at what he does -- started with children gathering water from the river. Her then slowly panned up the river, no more than a hundred yards, to someone exiting a "latrine" -- just an enclosed box with a hole in it on the end of a pier.