The number one cause of death among the elderly and small children is respiratory problems, due to the smoke of the fires built on the floor of homes. We install a simple wood-burning stove and pipe the smoke to the outside. The stove takes about a fourth of the wood that it takes to build a fire on the floor.
As in everything we do, this is a wonderful open door to share Jesus with the people. When they know you care enough to help them physically, they will listen to what you have to say spiritually.