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The basic idea behind C12 Negative is that there’s certain valuable materials that can be used as a carbon sink. To see if this idea works, you need to do a product lifecycle global warming potential calculation. My best estimate of the impact of consuming 1 kg of C12 Negative PLA filament is that 2.47 kg (3.27 kg if you’re dirty) CO2 equivalent emissions are released to the atmosphere. Here’s the breakdown: CO2 sequestered by …

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