Photo: Humans have got a thing for wood, but don’t seem to give a damn about trees. Despite all their life-giving actions, we’ve felled and burned them remorselessly over the last 12,000 years. More than half the trees that once grew on the planet have been cut down, including this western red cedar taken down by a lance-tooth crosscut saw. Cortes Island, British Columbia, Canada. DAVID ELLINGSEN