(NEWSER) – New York City has been experimenting with pilot food-composting programs—and it's worked surprisingly well, officials say. Now, Michael Bloomberg is pushing to make composting mandatory, as it is in Seattle, San Francisco, and many other cities, the New York Timesreports. The program, in which residents drop food waste into picnic-basket size containers at home, will begin as voluntary; residents will likely be required to comply within a few years, authorities note. "This is going to be really transformative," says a deputy mayor. "You want to get on a trajectory where you’re not sending anything to landfills."