Recently I was in Los Angeles on vacation and business. Well north of the city by the ocean, the sky was blue, every day was beautiful. But in the valleys and closer to LA the air was well ... beige. It's much better than it used to be in 1979 when I worked at NASA's Jet Propulsion Labs in Pasadena and the air was brown. Still, we need to use less carbon-emitting energy, increase energy efficiency and clean up the air -- for the planet and our health.

Florence Hudson: Smarter Buildings Make for a Sustainable Future