To provide an international perspective, and to get American students focused on the United Nations (UN) as a legitimate scientific institution, the United Nations and its role in addressing global environmental concerns should be taught in the American science classroom. The target audience for this paper is high school teachers. The United Nations is a huge organization, and an associated curriculum is not easily broken down into manageable lessons. There is a lack of pedagogical research on the use of the United Nations in the science classroom. I have provided instructional techniques on how to present a Model UN in the science classroom, as well as information on how to go about developing a lesson on the UN.