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The cow fart-machine
Food & climate action
Finalist of the Global Children's Design-a-thon 2019, Germany
The farts from the cows are collected by the cow fart machine (one for inside in the winter, one balloon-like one for in the summer, when the cows are in the field) and you can put them in the air-cleaner, where the CO2 is changed into O2.
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