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A comment on Robotic 'trees' can turn CO2 into concrete. Parent comment

Re:Robotic 'trees' can turn CO2 into concrete by FrojoS on Tuesday September 11, 2018 @08:00AM (#17958886)
For comparison. A ton of CO2 is roughly the equivalent of a London-NYC roundtrip in the economy class. https://calculator.carbonfootprint.com/calculator.aspx?tab=3
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