Renewables – Good for some things; not so good for others | Our Finite World: "Some seem to believe that renewables can power the world on a stand-alone basis. The tiny quantity of renewable energy currently available is, in and of itself, a huge limitation in making this happen. Furthermore, today’s solar PV panels and wind turbines are made and transported using fossil fuels, and most of our transportation industry uses petroleum. In theory, we could develop new devices that use only electricity, or create enough biofuels to make a complete closed loop (devices made and transported only with renewables). In practice, we have trillions of dollars of cars, trucks, airplanes, and construction machinery built to use oil. Because of this, a complete changeover to renewables is at best decades away."
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