"This coil.. .shown in my patents Nos. 645,576 and 649,621, in the form of a spiral, was, as you see, in the form of a cone...in an inductive coupling which was not close —we call it now a loose coupling - but free to permit a great resonant rise. That was the first single step, as I say, toward the evolution of an invention which I have called my 'magnifying transmitter.' That means, a circuit connected to ground and to the antenna, of a tremendous electromagnetic momentum and small damping factor, with all the conditions so determined that an immense accumulation of electrical energy can take place." - Nikola Tesla (Nikola Tesla on His Work with Alternating Currents, Leland Andersen, Editor, Sun Publishing, 1992, p. 72)
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It seems like the efforts to find the best alternative energy sources are seriously being looked into by lots of countries including most US cities. One proof is the signing of the Kyoto Treaty. The main aim of the concerned group and individuals is to lessen the greenhouse gases and pollutants.