Plastic Bags - there are trillions of them and they are the most abundant consumer product in the world according to Guinness World Records. We all use them. But after seeing this report, you may have second thoughts.

In her 2-part CNN Presents story "Plastic Wars" correspondent Amber Lyon finds plastic bags everywhere they should not be - in trees, on streets and even at the bottom of the ocean. She talks to a veterinarian who says he has seen plastic bags in the stomachs of whales, sea lions and dolphins. She meets with Andy Keller, whose mission is to rid the world of plastic bags, and with the man who represents the large corporation trying to stop him.

"Plastic Wars" is one of four stories airing the CNN Presents on Sunday, October 30th at 8:00 pm ET, re-airing at 11:00 pm ET and 2:00 am ET.