Humans

Denis Hayes on Being Green

Since his days as head of the Solar Energy Research Institute under President Jimmy Carter, Denis Hayes has been pushing to add more renewable energy sources to the country's energy portfolio. Hayes discusses the current U.S. market for renewables such as solar and wind, and gives his take on where he sees America's energy future headed.

Rolling Out Bamboo Bicycles

Valid Cycles specializes in handcrafted bamboo bicycle frames. To be bike-ready, the bamboo must be cooked in an oven, stripped, and sealed. But after that, the founders of Valid Cycles say the bikes last as long as a metal one. We stopped by their shop — a barn in Woodinville, Washington — for a look at how the bikes are put together.