Clearwater Hudson River Sloop: Clearwater conducts environmental education, advocacy programs and celebrations to protect the Hudson River, its tributaries and related bodies of water.
Healing the Hudson River: An overview of the three-decade-long battle to remove toxic PCB's from the Hudson river, from the Natural Resources Defense Council.
Hudson River PCBs Site Reassessment Main Page: Hudson River PCBs Superfund Site Reassessment.
Hudson Valley Biodiesel Cooperative: Yahoo group whose goal is to escalate the advancement of biodiesel technology in the Hudson Valley region by providing a focal-point and interactive forum for education and communication.
Scenic Hudson: A non-profit organization dedicated to protecting and restoring the Hudson River and the Hudson River Valley of New York State.