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For A Closer Look, ABC offered free publicity for the ten-year commitment by Google, the $200bn Internet search engine, to invest tens of millions of dollars--"a drop in the bucket really," as Neal Karlinsky (subscription required) put it--in the energy business. Google's goal is to invent three separate renewable systems for generating electricity that will be cleaner than coal and just as cheap. Method one is solar: not panels but "vast arrays of mirrors" that reflect the sun's rays intensely enough to produce steam. Method two is the wind: not windmills on the ground but tethered kites flying at high altitude where the prevailing wind does not gust but is consistently strong. Method three is deep inside the Earth: injecting water underground so geothermal energy produces steam.
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