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.
- http://groups.yahoo.com/group/HVBIODIESELCOOP/

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.
- http://www.nrdc.org/water/pollution/hhudson.asp

Hudson River PCBs Site Reassessment Main Page
- Hudson River PCBs Superfund Site Reassessment.
- http://www.epa.gov/hudson/

Scenic Hudson
- A non-profit organization dedicated to protecting and restoring the Hudson River and the Hudson River Valley of New York State.
- http://www.scenichudson.org

Clearwater Hudson River Sloop
- Clearwater conducts environmental education, advocacy programs and celebrations to protect the Hudson River, its tributaries and related bodies of water.
- http://clearwater.org