| ที่ | ชื่อเรื่อง |
| 1 | Grzimek’s Animal Life Encyclopedia: Extinction |
| 2 | Laboratory Animals |
| 3 | UXL Endangered Species |
| 4 | UXL Encyclopedia of Landforms and Other Geologic Features |
| 5 | Healthy Oceans: Why They Matter |
| 6 | Recycling |
| 7 | Saving Energy |
| 8 | Pollution A to Z |
| 9 | Walking, Biking, and Riding the Bus |
| 10 | Picking Up Trash |
| 11 | Achieving Sustainability: Visions, Principles, and Practices |
| 12 | Reusing |
| 13 | Respecting Nature |
| 14 | Unsustainable: The History and Politics of Green Energy |
| 15 | Pets |
| 16 | UXL Encyclopedia of Biomes |
| 17 | UXL Encyclopedia of Water Science |
| 18 | Weather Almanac |
| 19 | Farm Animals |
| 20 | Environmental Encyclopedia |
| 21 | Worldmark Encyclopedia of U.S. and Canadian Environmental Issues |
| 22 | Big Game Hunting |
| 23 | Water: Science and Issues |
| 24 | What Is the Impact of Ocean Pollution? |
| 25 | Planting Trees |
| 26 | Encyclopedia of Environmental Ethics and Philosophy |
| 27 | Grzimek’s Animal Life Encyclopedia: Evolution |
| 28 | Climate Change: In Context |
| 29 | Environmental Science: In Context |
| 30 | Grzimek’s Animal Life Encyclopedia |
| 31 | Grzimek’s Student Animal Life Resource |
| 32 | Saving Water |
| 33 | Alternative Energy |
| 34 | What Is the Impact of Excessive Waste and Garbage? |
| 35 | What Is the Impact of Climate Change? |
| 36 | UXL Encyclopedia of Weather and Natural Disasters |
| 37 | UXL Sustainable Living |
| 38 | Zoos and Aquariums |
| 39 | What Is the Impact of Declining Biodiversity? |
| 40 | Sustainable Luxury and Jewelry |
| 41 | Environmental Issues: Essential Primary Sources |
