A year after a tornado stuck Greensburg, Alan Hewitt and other residents are rebuilding the town to environmentally-sustainable building standards.
Kids at Sidwell Friends School in Washington, D.C., love their new 'green' campus.
The city may pass the most far-reaching ordinance in the US in March. It would require most new commercial and residential high-rises to meet Leadership in Energy and Environmental Design (LEED) standards.
A points system isn't the entire answer. But it can lead in the right direction.