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Mais boomt. Um damit Biogasanlagen zu betreiben, wird in Deutschland die Energiepflanze Mais mittlerweile auf 810.000 Hektar angebaut. Die riesigen Felder rufen immer mehr Kritiker auf den Plan. Denn die Biogastechnologie gilt nunmehr als Konkurrenz zur Nahrungsproduktion. Und was ist mit Biogas?
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