Tiny House

In terms of living space, how many square feet do you need? In the US, the average size of a home is 2,600 sq. feet. One of the child star's of the film "Slumdog Millionaire" is happy to have 250 sq. ft. for his family of four. Our guest, Elizabeth Turnbull describes her living space — all 144 sq. feet of it. She says size matters when you are thinking about a 'green' and a 'sustainable' home.