Greening your home

Tired of shockingly high heating and cooling bills? Do you want to reduce your home's carbon footprint? These factors prompted Garry Woods to design and build a home that was more eco-friendly. That project turned into a commercial enterprise called Greentec, a U.K. company that has grown 500 percent year over year since its founding in 2003. The company harnesses the earth's heat, enabling homeowners to heat and cool their houses for less than $200 a year. Hear his story!

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