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"Today we use biofuel from waste streams that are unfit to use for human or animal consumption." https://www.maersk.com/support/faqs/low-carbon-fuels-used-by-m

• plorg 3y ago
  That sounds more like biodigesters or landfill gas than the "hydrogen from renewable sources plus CO2 from the combustion of plant sources" described in a cousin comment.
  • lazide 3y ago
    It can also be exhaust from biofueled turbine power plants, which apparently are a thing in Northern Europe. Typically fed from timber harvest slash, brush, etc. [https://smartcitysweden.com/best-practice/399/swedens-largest-biofuel-heat-and-power-plant/ https://smartcitysweden.com/best-practice/399/swedens-larges...]
    • amenhotep 3y ago
      Chips from logging Canadian old growth forests, if you're Drax.