The global lack of toilets isn't just a question of niceties. The disease it causes are deadly and costly.
Worldwide, 2.5 billion people lack access to adequate sanitation, and an unsettling 1 billion still practice open defecation--which means they do their business where they can. When you account for the economics of this, the numbers are staggering. The World Bank says a lack of toilets costs $260 billion annually in health and societal impacts.