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> According to one eye-popping estimate, a cotton bag should be used at least 7,100 times to make it a truly environmentally friendly alternative to a conventional plastic bag.

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Only if said plastic bags are used as trash bags and incinerated.

Yeah I've never been a fan of that study. They take a bunch of categories where the bags basically all have negligible impact regardless of material (ozone depletion, ionizing radiation, etc) and compare them on those without using a particularly reasonable weighting scheme. And in all those categories, none of them really have anything to do with the actual reasons we want to move away from plastic bags (terrestrial and oceanic plastic waste, microplastics in water sources, etc).

I guess I think it just sort of misses the point. It's like if they were to say "oh we should keep burning fossil fuels instead of solar because solar uses 1000x more land" but then didn't mention or compare CO2 emission.

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