Volunteers from Prentiss Smith & Company help clean up the homeless encampment near the Elm Street bridge, in Brattleboro, Vt., as part of Connecticut River Conservancy’s 25th annual Source to Sea Cleanup on Saturday, Sept. 25, 2021. The annual Source to Sea Cleanup is a river cleanup coordinated by the Connecticut River Conservancy in all four states, Vermont, New Hampshire, Massachusetts, and Connecticut, along the 410-mile Connecticut River basin. This event is one of the largest river cleanups in the country. Thousands of volunteers remove trash along rivers, streams, parks, boat launches, trails, and more.