Extracting CO2 from the air likely requires some energy, and seafloor organisms are almost certainly energy-constrained. We could beat the seafloor simply by providing more energy, if we get within the ballpark of their efficiency. We have plenty of deserts and solar panels.
In all likelihood, we can get ~10x better efficiency without trying very hard.
Living beings don't focus much on growing. They are usually less than 1% efficient on that, with more complex life being on the order of 0.1% efficient.
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Extracting CO2 from the air likely requires some energy, and seafloor organisms are almost certainly energy-constrained. We could beat the seafloor simply by providing more energy, if we get within the ballpark of their efficiency. We have plenty of deserts and solar panels.
In all likelihood, we can get ~10x better efficiency without trying very hard.
Living beings don't focus much on growing. They are usually less than 1% efficient on that, with more complex life being on the order of 0.1% efficient.