The document discusses different types of environmental politics in the United States, including entrepreneurial politics, interest group politics, majoritarian politics, and client politics related to farmers and pesticides. It also covers definitions of key terms like environmental impact statements and control-and-command regulation. Major events that shaped environmental policy are outlined, such as the creation of the EPA in 1970 in response to an oil spill, and challenges of regulating issues like acid rain, automobiles, and agricultural pesticides. Scientific uncertainty is noted as an ongoing factor complicating environmental policymaking.