If IIRC && this refers to the same research I heard about earlier the it compares the main driver for resource usage for a cotton bag is watering. According to

If IIRC && this refers to the same research I heard about earlier the it compares the main driver for resource usage for a cotton bag is watering. According to that research the best option was a sturdier, reusable plastic bag. That said, I think we should be happy for people that use and reuse cotton bags. This is people that want to do the right thing.