These architect-designers are experimenting with 3D printers to eventually build houses and work spaces out of organic materials such as sand, salt and coffee grounds.

By Cynthia Stone, KQED

When environmental chemist David Stone decided to build a “green” greenhouse for his wife, he chose a material he’d invented, an environmentally friendly substitute for cement he calls Ferrock.

By Kathleen McCleery

Car owners have been wincing in recent months as the price of oil has shot up well over the once-unimaginable $100-per-barrel mark. But an economist at Carnegie Mellon University believes that skyrocketing oil prices are a good thing, and will…