From my money saving ezine:

Green-Type Produce Bag Challenge

I hate to burst any "green-type produce bag" bubbles, but my son recently participated in a Jr./Sr. High School science fair. I wandered through the exhibit hall, checking out the "competition," and saw that many of the kids did an experiment to see if the produce bags actually work. Consistently, these young scientists concluded that there was no difference between the produce bags, regular zip bags, no bag, and paper bags in the refrigerator. Any bag worked to ripen bananas and tomatoes outside the refrigerator. In other words, don't waste your money!
Julia J.