For International Day of the Girl, Meet 28 Women Changing the World Right This Second

Tillie Walton is a river conservationist, environmental consultant, and philanthropist. Walton was inspired by her many whitewater expeditions and river adventures through the years. Walton has been an adviser for the World Wildlife Fund and Aspen Center for Environmental Studies, among other organizations. She is currently in the process of creating a block-chain platform to organize water rights.