New York City has a lot of waste. And most of it, is food waste. Last year, the Department of Sanitation collected nearly 30,000 tons of banana peels, coffee grounds and expired lettuce. And the city is expanding its composting program. But not mandating it. If it did, it could be collecting 40 times that. As the program stands now, few people are participating. And environmentalists are hoping to get that number up. Meira Gebel reports.