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snail farm for massive carbon fixation

posted May 8, 2018, 10:15 PM by Paul, Hsieh-Fu Tsai   [ updated Aug 19, 2019, 9:09 PM ]
with the shell compsoition being CaCO2, the shell of snail or clams are more long term storage solution of CO2 compared to plants and animal. 

If fast growing snail or clams are cultured and the shells are stored, how much CO2 can we scavenge?

http://shellfish.ifas.ufl.edu/projects/shellfish-farm-environment/carbon-fixation/

clams grow 1cm, 0.7cm in the first two years



photosynthesis biotransformation generates carbohydrates which after carbs cycle, will still generate back CO2
chemical transformation will often generate CO2 and cost energy at some point

how about fixation of CO2 into carbonate with snail, oyster shell. 
launch to Mars for terraforming . 
will this be net reduction of CO2 ?


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