[youtube]http://www.youtube.com/watch?v=y_ZGBhy48YI
An energy-efficient heating and cooling alternative, this sustainable air conditioner keeps buildings comfortable by using the naturally existing heat contained about ten feet beneath the surface.
This month, challenge a neighbor to GOOD's energy smackdown. Find a neighbor with a household of roughly the same square footage and see who can trim their power bill the most. Throughout February, we'll share ideas and resources for shrinking your household carbon footprint, so join the conversation at good.is/energy.