Builders can build toward an energy-efficient future if they want to

Technology is advanced enough and the world is already full of cost-effective know-how for reducing energy use, AOL Real Estate says.

In fact, it’s even possible to achieve the goals recently brokered by President Obama with China to cut greenhouse gases by changing the way we use energy in our homes – and do it in style. Sheri Koones showcases some of the most energy efficient and “green” houses in 20 countries, including the United States.

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