The ReBuilding Center
- Recycling building materials. How to donate or purchase items, inventory list, description of their deconstruction services, and volunteer opportunities.
- http://www.rebuildingcenter.org/

Bark
- Grassroots group that works to preserve the forests, waters, and wildlife of Mt. Hood National Forest and surrounding regions. News, articles, events listings, and how to help.
- http://www.bark-out.org/

Portland, OR, Endangered Species Act Program
- Endangered Species Act Program, Portland, Oregon; steelhead and Chinook recovery efforts; Columbia, Willamette, Bull Run rivers.
- http://www.portlandonline.com/fish/index.cfm?c=29710

Friends of Trees
- Builds community partnerships to plant, preserve, care for, and educate about urban trees. Membership and event details, links to arborists, newsletter, and volunteer opportunities.
- http://www.friendsoftrees.org/

Johnson Creek Watershed Council
- Information on projects, events, resources and issues facing the Johnson Creek Watershed. Includes volunteer opportunities, calendar of events, and links to partners and other watershed organizations.
- http://www.jcwc.org/

Zenger Farm
- Created to educate youth and adults about environmental stewardship, sustainable urban agriculture, and green business development. History of the farm, information on their programs, volunteer opportunities, and articles.
- http://www.zengerfarm.org/

The Impacts of Climate Change on Portland's Water Supply
- An investigation of the effects of increased temperatures, changed precipitation, and shifts in the historic hydrologic cycle on the fresh water supply from the Bull Run watershed. From the Department of Civil and Environmental Engineering, University of
- http://www.tag.washington.edu/papers/papers/PortlandClimateReportFinal.pdf

GoBiodiesel Cooperative
- A biodiesel cooperative educating and offering biodiesel fuel. FAQs, how to get involved, educational resources, and diesel vehicles for sale.
- http://www.gobiodiesel.org

World Forestry Center
- Working to educate people about the world's forests and their relationship to all life. Information about their educational exhibits and programs, international programs, and research activities.
- http://www.worldforestry.org/

Hoyt Arboretum
- Non-profit greenspace located two miles from downtown Portland. Features nature-focused instruction, a plant collection and volunteer information.
- http://www.hoytarboretum.org/

Macaw Landing Foundation
- Dedicated to the preservation of macaws through research, public education, and ecotourism. Features newsletter, macaws on the endangered species list and field projects.
- http://www.macawlanding.org/

Volunteers in the Gorge
- Organization with park information including events, habitat, conservation efforts, and photo gallery.
- http://www.volunteersinthegorge.org

Sustainable Ecosystems Institute
- A scientific resource for individuals, organizations, and governments seeking solutions to natural resource issues.
- http://www.sei.org/

Oregon Trout
- An organization whose mission is to protect and restore native wild fish and the ecosystems that sustain them.
- http://www.ortrout.org/

Oregon Sierra Club
- Public interest organization promoting conservation of the natural environment in Oregon through legislative, administrative, legal, and electoral activities.
- http://www.oregon.sierraclub.org/

Audubon Society of Portland
- Detailed birding information, conservation news, classes, nature viewing sites, and newsletter.
- http://www.audubonportland.org/