I don't think people tend to use plastic bags twice. Instead they double bag. And as I alluded to above, not all bags of the same material are made equal. The

I don't think people tend to use plastic bags twice. Instead they double bag. And as I alluded to above, not all bags of the same material are made equal. The original British source has a range of 80-250g for cotton bags. The ones I use weigh in at less than 50g. https://www.gov.uk/government/publications/life-cycle-assessment-of-supermarket-carrierbags-a-review-of-the-bags-available-in-2006 https://www.gov.uk/government/publications/life-cycle-assess...