Last year, women visiting a neonatal clinic at a hospital in Kiboga, Uganda, began using two waterless, standalone bathrooms that offered a cleaner and more private alternative to the pit latrines that are standard in the region. The deployment was the culmination of years of work by the startup change:WATER Labs, co-founded by two MIT research scientists — and its success showed the company’s potential to improve lives far beyond Uganda. Half of the world’s population lacks access to toilets that safely manage human waste, with women and children bearing…