Watch Blue Carbon: A Story from the Snohomish Estuary (1970) : Full Movie Online Free There’s good reason humans have long been drawn to estuaries. These places where river and sea meet provide rich fish habitat, protect shorelines and improve water quality. But another huge benefit of estuaries is just beginning to be understood: their potential for capturing and storing massive amounts of carbon. This film focuses in on Washington’s Snohomish estuary, where people are learning firsthand just how crucial estuary restoration can be.