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Eg when plastic bags are free Grandma wants 5 things in 2 doubled bags but at 8 cents each she'll just stick them in the cart with no bag at all and transfer them to the back seat even if 8c for single bag to carry them in would add negligible costs to her $120 basket.


But grandma is also buying trash bags now because she used to use the free bags for trash. Probably net zero if not net negative plastic consumption.




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