We all accept that any home built before 1980 probably consumes energy rather than produces. And we know that most buildings today aren’t much better. Some dabble in industry-tested, user-approved microcosms of water conservation and energy production, and even fewer have thrown away the sound bites of “first cost” and “investment return” and have dove head first into responsible yet expensive net zero homes. Interestingly, The Center for Green Buildings and Cities at Harvard is exploring a strategy that may end up making a huge difference in the average home owner’s ability to achieve energy and water independence. They are currently experimenting with retrofitting a pre-1940’s home to attain net zero. The measures for success will be varied and at this point will still act as a testing grounds for possibilities.