This case study examines the activities of USAID’s Clean Cities Blue Ocean program in Parañaque City, Philippines using the lens of USAID’s building blocks for preventing ocean plastic pollution. To improve the livelihoods of the millions of people that are involved in the waste management sector, USAID supports training for independent waste collectors, connects them to strengthened recycling markets, and engages community-based organizations, women’s organizations, schools, and small businesses who are instrumental in creating behavior change.