Recycle: Low-density polyethylene (LDPE), commonly found in plastic wrapping films for food or dry cleaning, as well as grocery or sandwich bags, is accepted by very few curbside recycling programs. Check Earth 911 to see if your municipal recycling center accepts number 4's.

Whole Foods, Wal-Mart, and Wegman stores will recycle any plastic bags if you take them to the store. In California, all big stores are required to provide recycling boxes for used plastic bags. Check Earth 911 to find the location nearest you.