Seaweed and fish, grown together, can deliver far more protein and far less pollution. Agardh reduced levels of polluting ammonia from fish-contaminated water to below detectable levels, seemingly absorbing all the waste and using it to power its own growth. Sea lettuce was very good at absorbing carbon from the water, taking up more than any other seaweed species and leaving the water significantly cleared of dissolved CO2 while generating more oxygen than any other species.
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