Earth Day Should Celebrate “Engines and Electricity”

By Viv Forbes – Re-Blogged From http://www.WattsUpWithThat.com

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 human energy.

Then humans learned how to control fire for warmth, cooking, warfare and hunting.

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