Clearwater conducts environmental education, advocacy programs and celebrations. The nucleus of the activities is to protect the Hudson River, its tributaries and related water bodies, and to create public awareness of the estuary’s complex relationship with the coastal zone. A magnificent natural design blending the freshwater streams of the Adirondacks with the salt tides of the Atlantic, the Hudson is a prime example of an estuary’s ecosystem that, as a type, ranks second only to rain forests in biological productivity.