The dramatic increase in the number of nongovernmental organizations (NGOs) over the past century has been well-documented as has the fact that these organizations increasingly participate in global environmental politics. Academic interest in the role of NGOs in global environmental politics has also risen dramatically over the past decade, with virtually every study of international environmental issues mentioning NGOs as important actors. A growing body of evidence indicates that NGOs influence government decisions to develop domestic policies to protect natural resources and to negotiate international treaties, as well as how individuals perceive environmental problems.