If you live in CA, you don't use these bags at all...
My city charges for bags but the next town over does not. Thankfully, the grocery store up the street from my residence is technically over the city line. Free bags for me (if I need them). Honestly, I reuse them so much (they make GREAT lunch sacks) that I don't feel badly.
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"You're adorable. " ~ DrPhil
♫ All of my love, my peace, and happiness...I'm gonna give it to DELTA. ♫