When excess food spoils or goes to waste, it is moved to landfills, producing methane and accelerating climate change—unless it is composted. Ken Dunn, president and founder of Resource Center, a nonprofit recycling-focused organization, picks up compostable waste around the city and brings it to local organic, City Farm. Dunn spoke to The Chronicle about the value of recycling and what his nonprofit has done for sustainability throughout its 35 years. Video produced by Samantha Tadelman, Multimedia Editor, stadelman@chroniclemail.com.