1. Break Through: From the Death of Environmentalism to the Politics of Possibility.;T Nordhaus,2007
2. Roadmap Toward a New Ecological Majority.;Earthjustice,2005
3. The Death of Environmentalism: Global Warming Politics in a Post Environmental World.;M Shellenberger,2004
4. Evidence for a fundamental and pervasive shift away from nature-based recreation.;ORW Pergams;Proceedings of the National Academy of Sciences USA,2008
5. Ominous trends in nature recreation.;P Kareiva;Proceedings of the National Academy of Sciences USA,2008