That bottle of California Merlot you quaff at a San Francisco eatery may very well have been fertilized by food waste from a meal you ate at the same restaurant a few years ago. Since 1997, over 2000 San Francisco restaurants have joined a composting program that provides them with a discount on their trash hauling bill. These restaurants are getting a head start on complying with a legislative deadline. The city has mandated that 75 percent of its garbage must be recycled or composted by 2010. Read and listen to the story on NPR's Day to Day.