This collection of essays examines the variety of ways in which communication scholarship and research contribute to the political mobilization and empowerment of citizens to act on environmental issues - environmental discourse and action in the largest sense. As seen here, the task of environmental empowerment involves a curious mixture of national and local politics, abstract principles and concrete actions, ethical frameworks and political expediency. The contributors to this volume provide a fascinating array of perspectives on how to go about this task and how "earthtalk" continues to shape and frame human perceptions and actions on environmental issues. This unique work will be of interest to scholars, policymakers, and students of political communication, public policy, and the environment.