Weatherizing against emissions

Nothing screams green more than a home with rooftop solar panels and a Toyota Prius in the driveway. But when it comes to saving money and the planet, it turns out the lowly caulk gun has these high tech gadgets beat by a mile. A recent report (by McKinsey and Co.) found that simply plugging leaks and improving efficiency in existing buildings would do more to reduce CO2 emissions than ramping up wind and solar power. And it would also pay for itself. Sam Eaton from the Marketplace Sustainability Desk decided to put this theory to the test on his aging Los Angeles home.

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