Brent has been a lifelong advocate for environmental protection and economic sensibility. As one of the original founders of American Rivers, he was instrumental in fighting unnecessary dams. He spent many years as president of Friends of the Earth, testified before Congress more than 100 times, helped expand the Wild and Scenic Rivers System from eight rivers in 1973 to over 200 today, initiated reforms to make the World Bank more conscious of the environment, and has written extensively on environmental economics.
Brent has been a staunch advocate of environmental sustainability since his eyes were first opened to the issue on the original Earth Day in 1970. While Brent is now retired, his work on behalf of rivers and all natural resources is by no means done. He serves on the executive board and writes for the Center for the Advancement of the Steady State Economy. Brent also lends his expertise to a number of organizations including Restore Hetch Hetchy, League of Conservation Voters, Global Development and Environment Institute, Gender Action, and Environmental Media Association. His progressive voice has instigated change for groups and individuals around the world.