The United States Agency for International Development (USAID) leads the U.S. Government's international development and disaster assistance efforts with the mission of promoting and demonstrating democratic values abroad, and advancing a free, peaceful, and prosperous world. The majority of marine debris--and, in particular, ocean plastic pollution--comes from rapidly growing cities in the developing world that lack effective waste management systems and infrastructure. Since 2016, USAID has worked to reduce the flow of mismanaged plastic waste entering the marine environment by supporting key countries in strengthening their solid waste management systems and promoting the 3Rs (reduce, reuse, recycle). USAID focuses on working with local governments, communities, and the private sector to promote locally-led and locally-appropriate solutions to the challenge of marine debris.