“In the U.S. alone, we throw away 37 million tons of wood waste,” said Eric Law, co-founder and CEO of Urban Machine. “That’s about half of what we harvest every year.” Law saw tremendous opportunity ...

Inside a workshop near Boston, a six-foot-long 3D printer is churning out furniture that looks indistinguishable from wood, built layer by layer from sawdust that otherwise would have been wasted. “We ...