Solar Energy International (SEI), from Carbondale, CO, is a non-profit that trains adults and youth in renewable energy and environmental building technologies. Since 1991, SEI has taught thousands of individuals from 12 US states and around the world, pioneering a hands-on approach acknowledged as the benchmark for renewable energy education and training. SEI staff are avid solar enthusiasts with decades of experience in passive solar design & construction, solar hot water, wind and micro-hydro power, solar cooking, and natural house building.