Recently, Wal-Mart has sent a questionnaire to all their suppliers, including for food items, asking them to give answers to 15 questions about they actually do about sustainability.
I like this questionnaire, because it is simple, practical and straight to the point. Suppliers who have difficulties to figure out the answers definitely have quite some catching up to do, because this is not going away.
This is the first step to impose a change towards sustainable products, and we can expect that this document, although only the beginning, will soon become the standard for retailers, and therefore to industry. I believe that their approach will be much more effective than all the partisan talk that seems to create more division than help create a comprehensive plan for the general interest.
I recommend reading this article from GreenBiz, which explains quite well what the Wal-Mart questionnaire will concretely mean for suppliers.