Using the lo-fab way of building, even aesthetic decisions can be designed to impact people's lives.In Butaro, we chose to use a local volcanic stone found in abundance within the area,but often considered a nuisance by farmers, and piled on the side of the road.We worked with these masons to cut these stones and form them into the walls of the hospital.And when they began on this corner and wrapped around the entire hospital,they were so good at putting these stones together,they asked us if they could take down the original wall and rebuild it.And you see what is possible. It's beautiful.And the beauty, to me, comes from the fact that I know that hands cut these stones,and they formed them into this thick wall, made only in this place with rocks from this soil.When you go outside today and you look at your built world, ask not only:"What is the environmental footprint?" -- an important questionbut what if we also asked, "What is the human handprint of those who made it?"We started a new practice based around these questions, and we tested it around the world.Like in Haiti, where we asked if a new hospital could help end the epidemic of cholera.In this 100-bed hospital, we designed a simple strategy to clean contaminated medical waste before it enters the water table,
