There are hundreds of student organizations here at Ohio University for students to get involved in. Many are social, but many provide a platform to get involved in an issue you are passionate about. Ohio University has many different groups.
The Encyclopedia of Associations, a standard reference work, is included in this e-compilation. It lists national, international, and local orgs with their purposes, memberships, etc.For example, a search here on "Global warming" offers 44 environmental groups such as Clean Air Watch and the Alliance for Climate Education.