All are also highly transparent about their food production processes.

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These, he says, are 1, 500 times better than existing sensors at detecting hydrogen. (The gas combines with the tubes, changing their electrical properties.) Hydrogen detection is used to help control certain processes in industrial food production, for tweaking fuel combustion in car engines, and in monitoring certain bacterial infections.

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Pure Power processes the woody biomass to produce ethanol for fuel, xylitol for food sweetening and lignin for the production of biopolymers.

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