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Another interesting point is that you can, in fact, eat algae, even after the oils have been extracted. Many of the strains being developed for petroleum replacement are types of spirulina, one of the most nutrient-dense plants on the planet. Health food nuts will know what that is.

Once algae is used, it can be recycled as fast-setting compost for more algae or dried into cakes to be fed to livestock or even humans.