Whole Foods has announced that starting in May, its stores will feature paper bags certified as responsible by the Forest Stewardship Council. This means that paper used to make the bags may be sourced from postconsumer recycled fiber or from forests certified by the FSC for quality forest management. Essentially, this is a step toward greater accountability in that the FSC process allows bags to be tracked -- from sourcing to processing to distribution. The upshot is that we, the customers, can rely on the fact that the bag is sourced, produced, and used in the most responsible way possible. Previously, Whole Foods offered bags that were 100 percent recycled, including 60 percent postindustrial and 40 percent postconsumer waste. It banned plastic from its stores last year, a move the company says keeps 150 million bags from being trashed. Of course, the best way to reduce your impact? Bring your own reusable bag.