1. Pre-American ecology : environmental alteration is addressed (1100-1854)
2. Colonial environmentalism : the first land use & timber regulations (1681)
3. Transcending society : the sacrament of wilderness (1862)
4. The national park system : preserving wilderness for public use (1865)
5. Animals and the environment : creation of the ASPCA (1866)
6. The timber barons : profit vs. sustainability (1889)
7. The conservationists : save what is left of the forests (1901)
8. Naturalist in the capital, Theodore Roosevelt : American wilderness as America's cultural heritage (1908)
9. The park service : reforming the federal park management system (1908)
10. Lobbyists for life : devastating effects form unlikely alliance (1936)
11. The whole of the wild : interconnectiveness of nature (1944)
12. Change is in the air : the first Air Pollution Control Act (1955)
13. Environmental progress : synthetic pesticides and corporate accountability (1962)
14. The new danger : the protection of endangered species (1966)
15. Smoke on the water : the Environmental Protection Agency (1970)
16. The environmental days : the first Earth Day (1970)
17. Beyond the government : Greenpeace makes international headlines (1975)
18. Pollution solutions : changes in the automobile industry (1970)
19. Ozone depletion : success of the Montreal Protocol (1987)
20. Climate chaos part I : the first warning is sounded (1847)
21. Climate chaos part II : climate-change denial (1980s-2000s)
22. Globalizing environmentalism : international conferences (1972-2017)
23. Oceans in the balance : the Great Pacific Garbage Patch (1997)
24. Urbane ecology : development of green cities (1800s-present)
25. Renewing perspectives : harnessing wind, water, and sun (1960s-present)
26. Cyclic waste : reduce, reuse, recycle (1970s-present)
27. America's black heart : the debate over coal (2017)
28. Leaving the environment behind : environmental policies rolled back (2017).