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  • Biofuels
    • Alternative to fossil fuels
      • No net increase in greenhouse gases
        • "Carbon neutral"-biofuels are burnt at the same rate biomass is produced
      • Do not release particulates (soot)
    • Gasohol-alcohol mixed with petrol: good for places with sugar cane but little oil-cheaper than importing
    • Habitats may become extinct
    • Biogas-clean, but does not produce as much energy
      • Produced in a continuous flow digester
      • Enzymes denature above 45 degrees C


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