When Christine Fisk toured a foreclosed home in Phoenix that had been renovated to be more energy-efficient, she wasn’t sold on its environmental benefits. But the two-bedroom bungalow was just minutes from her office and in good shape, so the financial adviser bought it for $150,000. A year in, Fisk is a believer: Her last electric bill was under $40, far less than she expected. “My day-to-day reality is dollars and cents, so everything that trickles down into my pocketbook is important,” she says.