There are heaps of environmental organizations, but some include Greenpeace and WWF.

A concise list of non-profit organizations, by county, can be found at http://www.taxexemptworld.com/organizations/wisconsin-counties.asp

Nongovernmental organizations (NGOs) work in environmental protection, education, and health care.

To find a list of non profit organizations, check online at the site Non Profit List or List of Non Profit Organizations. Try your local phone book to find a non profit near you.

There are quite a few international environmental organizations. Here are some of the organizations: Earth system Governance Project, Global Environment Facility, intergovernmental Panel on Climate Change, United Nations Environment Programme and the World Nature Organization.