You’re a total waste case. Forty percent of America’s food supply gets thrown out every day. All that waste is overflowing trash bins, depleting resources, and costing you money. So what’s the solution? Shop more. Slate’s Eric Holthaus explains how all those trips to Costco and Wal-Mart are filling landfills and — contrary to what it might feel like — emptying your bank account. So stop buying bulk. (If nothing else, this article managed to make me feel pretty good about polishing off that 48-gallon drum of yogurt-covered pretzels.)