We know how plants make oxygen, why can’t we automate that process and not worry about losing plants?
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a) We’re not exactly running out of oxygen.
b) If we’re trying to remove carbon dioxide, the scale of it is probably about 50,000,000,000 tons a year. If you like more zeros, this is 50,000,000,000,000 kilograms or 110,000,000,000,000 pounds of CO2 a year just to get some progress.
The chemistry is not super difficult but the raw materials and energy is pretty expensive.
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