Homes, farms, businesses, schools and even governments in greater Minnesota are opening their doors to the public next month. Come and learn about renewable energy, energy efficiency, green building techniques and sustainability from people who own, live in, or work with renewable energy on Saturday, October 4th. The tour is free, open to the public and self-guided. Check out sites in your area of the state on the MRES website, plan your route and stop by between 10 am and 4pm. At the writing of this article we have exemplary sites as far north as Ely, east to Wisconsin, south to Winona, west to Granite Falls, and many in the heart of Minnesota.