The occurrence of these acts/movements in ascending order are as follows.
1. Federal Water Pollution Control Act - 1948
2. Clean Air Act - 1963
3. Water Quality Act - 1965
4. Clean Water Act - 1972
5. Endangered Species Preservation Act - 1973
6. Energy Supply and Environmental Coordination Act - 1974
7. Eastern Wilderness Act - 1975
8. Toxic Substances Control Act - 1976
9. Intergovernmental Panel on Climate Change (IPCC) - 1988
10. Nature Conservancy - 1992