Guest opinion by Viv Forbes Most chapters of human history are defined by the tools and machines that were used. In the Stone Age, the first tools were “green tools” – digging sticks, spears, boomerangs, bows and arrows made of wood; and axes, clubs, knives and grinders made of stone. These were all powered by … Continue reading "Earth Day should Celebrate “Engines and Electricity”"
via Watts Up With That?
April 22, 2018 at 07:19PM