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Cuban pig farmer Daniel Garcia is shown here in his second but related role as an energy producer. Garcia uses this biodigester to turn his pigs’ manure into a methane and carbon dioxide biogas, which he and his neighbors use for cooking. The project is the result of a Cuban government initiative promoting the use of renewable energy.
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Willie Jones is an associate editor at IEEE Spectrum. In addition to editing and planning daily coverage, he manages several of Spectrum's newsletters and contributes regularly to the monthly Big Picture section that appears in the print edition.