There are homeowners who make a sustainable home by putting in energy-efficient light bulbs and there are those who take it to the next level. DivineCaroline.com has a list of 10 innovative homes that are pushing the boundaries of sustainable construction and living. Some of the homes look quite conventional while others look like they belong on the Moon. My favorite is the home pictured here; the walls are constructed of misprinted rice bags filled with natural material and the outside layer is made of papercrete, recycled paper mixed with cement. Use of these recycled materials reduces the use of wood, concrete and steel. These homeowners want to live off the grid entirely; they grow their own food in a greenhouse and the heating system is solar powered. Read more about this home and others in the Divine Caroline article.