California is making food labels less confusing by banning "sell by" dates. The new law starting Wednesday requires manufacturers to use just two labels: "Best if Used By" for peak quality and "Use By" for safety. This change aims to reduce food waste and emissions. California is the first state to standardize labels, with New York following suit. Other states are considering similar laws. The confusion over labels has led to significant food waste, with nearly 20% of food wasted because of unclear labeling. Advocates believe this simple change can make a big impact.