Food waste is a nation-wide problem. According to the United States Department of Agriculture, U.S. food waste is estimated at between 30-40 percent of the food supply. It ends up in landfills and is harmful to the environment because it emits methane, a greenhouse gas, as it decomposes. One factor in creating food waste is the misinterpretation of expiration labels and dates. Studies show that fixing food date labels is the most cost-effective solution for reducing food waste. Some states, such as California, are working on legislation to standardize labels. Meanwhile, here’s how you can help:Understand expiration labels• “Sell-By” date tells the store how long to display the product for sale. This product should be purchased before this date. • “Best If Used By (or Before)” date is recommended for best flavor or quality. This refers strictly to quality, not safety. • “Use-By” date is the last date recommended for use of the product. Discard product after this date. Follow these tips when shopping• Purchase the product before the expiration date. • If perishable, take the food home immediately after purchase and refrigerate it promptly. Freeze it if you can’t use it within the time recommended on the label. • Once a perishable product is frozen, it doesn’t matter if the date expires because foods kept frozen continuously are safe indefinitely. • Follow handling recommendations on the product.