Have you ever wondered how recycling gets sorted after it leaves your bins? What happens to the clothes you give to Goodwill? How recycled goods become new products? What’s compostable?

June Fourth Friday attendees got to learn how, with Racing to Zero, a fascinating nuts-and-bolts view of how San Francisco is working to achieve zero waste. Viewers got to see the people, machinery, and amazing processes that all go into reducing the waste that goes into Bay Area landfills. And there’s plenty of education involved, too, with inspectors who go around checking people’s waste bins and leaving friendly little notes about how to do a better job sorting.