You may think that an existing or historic home—known for its drafty windows, old-fashioned mechanical systems, and obsolete construction materials and techniques—would be one of the least sustainable, green-friendly buildings around, but you'd be oh-so-very wrong! Photo 5 of 7 in Homes with a Midwestern State of Mind by Matthew Keeshin from Modern Homes Across the American Midwest

Homes with a Midwestern State of Mind

5 of 7

You may think that an existing or historic home—known for its drafty windows, old-fashioned mechanical systems, and obsolete construction materials and techniques—would be one of the least sustainable, green-friendly buildings around, but you'd be oh-so-very wrong!