 Any sanitation system that doesn't treat waste locally in developing countries should be illegal. We know the number one pollutant to water is a lack of sanitation. It's the number two killer of children worldwide under five. Hundreds of thousands of liters of untreated waste are getting dumped in the Ganges every single day. This is happening in every waterway in the world. When Colorado was introduced in Haiti, one untreated toilet killed 10,000 people and if sick in half a million people. So we know it's time to deal with this, but we also have to deal with it in a new way now. It's not enough to have a sanitation system that's just collection. You have to treat waste locally, affordably. You can't hike it in and out everywhere. We have a responsibility with what we've done to the earth to not cause any more problems. Every solution now has to address multiple problems. Like our sanitation system, you end up with finished compost, which helps in agriculture, which helps clean the water, treating waste, which helps with child malnutrition, productivity for mothers. We have to lighten the load for the earth in multiple areas rapidly together. You have to have technologies that you can fix in the middle of nowhere with whatever local materials they are. You can't be waiting for customs for things to clear for six months and you can't be waiting for a generator that runs a gasoline that no one can afford that breaks or gets stolen. I am hopeful. I also believe in the magical genius of the human race.