World Conservation Union - IUCN
The World Conservation Union is the world’s largest and most important conservation network. The Union brings together 82 States, 111 government agencies, more than 800 non-governmental organizations (NGOs), and some 10,000 scientists and experts from 181 countries in a unique worldwide partnership.The Union’s mission is to influence, encourage and assist societies throughout the world to conserve the integrity and diversity of nature and to ensure that any use of natural resources is equitable and ecologically sustainable.

Friends of the Earth
A national, nonprofit advocacy organization dedicated to protecting the planet from environmental degradation; preserving biological, cultural, and ethnic diversity; and empowering citizens to have an influential voice in discussions affecting the quality of their environment and their lives.

Global Action Plan
Empowering individuals to create sustainable lifestyles and livable neighborhoods through contracts with public sector agencies.

Sierra Club
Broad-based environmental organization dedicated to protecting and preserving the environment and its natural resources. Involved with most major environmental issues.

The Nature Conservancy
The mission of The Nature Conservancy is to preserve the plants, animals, and natural communities that represent the diversity of life on Earth by protecting the lands and waters they need to survive. The Conservancy protects specific places where plant and animal species can survive for generations to come. It employs a scientific, systematic analysis to identify places large enough in scale and rich enough in plant and animals species to ensure meaningful conservation results.