The Chesapeake Bay Foundation has spent the past fifty years working on a complex ecological problem. The Chesapeake Bay is an estuary in Maryland, Delaware, D.C. and Virginia. While about half of its water comes from the Atlantic Ocean, the rest flows to the bay from 64,000 square miles of watershed – spanning 6 states and home to over 18 million people. Pollution from sewage, agriculture, and industry (as well as other impacts of human development) have degraded the bay’s water quality, damaging biodiversity as well as human health, economics, and recreation. Chesapeake Bay Foundation (CBF) is a private sector group using many approaches to tackle this regional issue.