From the article:
Mexico City becomes the second large metropolitan area in the Western Hemisphere to outlaw the bags. San Francisco in March 2007 enacted an ordinance that gave supermarkets six months and large chain pharmacies about a year to phase out the bags. Los Angeles is set to impose a ban if the state of California does not enact a statewide 25-cent fee per bag by July.
About 90 percent of the bags used in the United States are not recycled.
Read the whole thing here.