suggests, he has chosen to generate it from sunlight.7 This is a land-hungry form of power generation. Even so, according to a paper in Engineering Biology, producing bacterial protein with solar panels needs between thirty and sixty times less land than soy protein.8 If wind power were used instead, the paper maintains, the ratio would rise to between 150 and 400 times. If the wind turbines were built offshore, where much larger machines tend to be used, even less land (or seabed) would be needed. If the hydrogen were produced by fourth-generation nuclear reactors, the space required would be
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