Th link might be of interest,
http://www.oregonlive.com/news/oregonian/index.ssf?/base/news/1179372306313200.xml&coll=7#continue
It points to an article titled "Paper or plastic? Which bag is the best choice for the environment?"
At a quick scan, I don't remember see much discussion on consumers reusing their bags except that some store gives a 10c refund on consumers supplying their own bags.
