As a follow up on a previous story:
http://mwiner.wordpress.com/2009/06/06/letting-the-endangered-cat-out-of-the-plastic-bag/
The demonization of plastic retail bags starts with this 1987 Canadian study:
[Piatt, J.F. and D.N. Nettleship. 1987. Incidental catch of marine birds and mammals in fishing nets off Newfoundland, Canada. Marine Pollution Bulletin 18(6B): 344-349]
It found that, between 1981 and 1984, more than 100,000 marine mammals and birds [...]