A healthy ocean benefits nature and people alike: the ocean sustains all life on Earth, regulates our climate and weather, and provides food and jobs for billions of people. But today, the combined impacts of overfishing, rising greenhouse gas emissions—leading to ocean warming, sea-level rise, and ocean acidification—and plastic pollution threaten ocean health and marine biodiversity. USAID's programs in marine, coastal, and fisheries management; nature-based solutions; and ocean plastic pollution aim to address these threats around the world.