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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 ph0rque on Tuesday September 11, 2018 @02:00PM (#17961922)
~$6 per (short) ton ($0.10 per tree planted, which removes ~34 lbs of carbon per year). More here: http://shindyapin.tumblr.com/post/141034501197/climate-chang...
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