National Public Radio: Emanuel Madison goes door to door in Los Angeles’ Leimert Park neighborhood as a “recycling ambassador.” His mission: to distribute 2-gallon kitchen pails to houses targeted in an experimental garbage pickup program. “I feel like Little Red Riding Hood,” he jokes, “only I’m carrying green baskets.” Larry Roberts gets out of bed to answer the door in his underwear. Madison gives him the sales pitch, explaining that the City of Los Angeles is launching a food scraps program by …