Chet Shank, age 38, owner of Thinking Green Systems, LLC, Shippensburg, 
Penn.
What I do:
I’ve been building houses for 20 years and began Thinking Green Systems a little over a year ago. The company is a dealer and installer of “BioBased 501″, a spray-in soybean oil-based polyurethane foam insulation, which does not contain formaldehyde and does not emit CFCs or HFCs.
How it helps:
This insulation is made without petroleum products which are fossil fuels. BioBased 501 is made from soybeans, an annually renewable resource.
