... 2002 marked the 25th anniversary of the plastic shopping bag. In this short period of time worldwide consumption has reached an estimated 500 billion to 1 trillion plastic bags per year. This enormous consumption has created several problems including: large volumes of pollution and wind-blown litter, significant resource consumption (primarily oil), high cost to retail industry (estimated at $30 billion annually) passed along to consumer in the form of higher prices. Ultimately, all these "free" bags cost both consumers and the environment plenty.
Top Plastic Bag Facts Presented by Reusablebags.com: