The 13th edition is the "official" text required for the course.
| Unit | Chapters in the 13 ed. | 12 ed | 14 ed |
| 1 | 9 - Population dynamics, carrying capacity and conservation biology | 9 | 9 |
| 12- The human population: Growth, Demography, and Carrying Capacity | 11 | 10 | |
13 - Food Resources |
12 | 14 | |
| 2 | 14 - Water Resources | 13 | 15 |
| 15 - Geological Resources: Nonrenewable mineral and energy resources | 14 | 16 & 17 | |
| 16 - Energy Efficiency and Renewable Energy | 15 | 18 | |
| 3 | 11 - Risk, Toxicology, and Human Health | 16 | 19 |
| 17 - Air and Air Pollution | 17 | 20 | |
| 18 - Climate Change and Ozone Loss | 18 | 21 | |
| 19 - Water Pollution | 19 | 22 | |
| 4 | 8 - Community Ecology: Structure, Species Interactions, Succession and Sustainability | 8 | 8 |
| 25 - Sustainable Cities: Urban Land Use and Management | 25 | 25 | |
| 26 - Economics, Environment, and Sustainability | 26 | 26 |