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A copper plate bolted to the back of a solar panel catches the 80 percent of sunlight that never becomes electricity, lifts the panel's output by 59.3 percent, sends that heat into a reactor pulling bagged fertilizer out of real human urine, and the startup is selling to slaughterhouses


Solar panels are at their worst on exactly the day you want them at their best. Heat makes a panel's voltage sag, so a blistering August afternoon can turn

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