The document discusses the history and development of environmental policy over time, from the initial lack of regulations in the past to the modern environmental movement and various policies enacted by governments at all levels to address issues like pollution, endangered species, and more. It also examines the various stakeholders that influence policy, including government, citizens, science, and non-governmental organizations, and how environmental issues rise on the policy agenda through public awareness. Overall it traces the progress that has been made but notes there is still work to be done to fully address environmental problems.