Americans waste 38 million tons of food with a value of $165 billion each year. Reducing food waste is a major contribution to fighting global warming as agriculture is a leading source of carbon emissions. A new report looks at food waste from the perspective of “lost” health. If all that lost food were put on people’s plates, it would be enough to provide more than 190 million adults—80 percent of the American population—with 2,000 calories of energy every day. Remember that about 14 percent of U.S. households sometimes have trouble putting food on the table. “U.S. landfills represent vast repositories of lost nutrition,” according to the report.