![Wemaynotbeawareofit,butordinaryfamilyhomesintheU.S.andt...]( "Wemaynotbeawareofit,butordinaryfamilyhomesintheU.S.andt...")
- 问题详情：Wemaynotbeawareofit,butordinaryfamilyhomesintheU.S.andtherestoftheworldarenotenergy-efficient.Mostoftheirenergygoestoheatingandcooling,andalotofitiswasted,aswarmairandcoolairescapethroughfireplacechimneysandthinorpoorlyfittingwindowsanddoors....
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