Dan Chiras is a highly respected educator and the internationally acclaimed author of over 30 books on residential renewable energy, green building and sustainability, including The Homeowner's Guide to Renewable Energy and Power from the Sun. He has studied and written extensively about ecologically sound waste water systems. Dan is the president of Sustainable Systems Design and the director and lead instructor at The Evergreen Institute's Center for Renewable Energy and Green Building (www.evergreeninstitute.org), where he teaches workshops on sustainable waste management, self-sufficiency, energy efficiency, solar electric and solar thermal systems, wind energy, green building, natural plasters, and natural building.