Why does not the planet run on Tesla Power?

tesla documentary well-known item: question TxSense : Why not run the planet on the power of Tesla I saw a documentary about how Nikola Tesla, the inventor of the Tesla coil has identified a way to make the planet cost-free energy just incorporated the energy that is already in the air. I remember, they say that the energy from the sun and there is so a lot one on this earth, it would be impossible to use it all up. Thought of ​​Nikola Tesla was funded by a group of investors, but then

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