• The Ocean Realm: Saltwater Ecology (1991)
• The River of Life: The Hydrologic Cycle and Water Pollution (1991)
• Mud and Salt: The World of the Estuary (1991)
• Earth Science Experiments (1994)
• The Battle for San Bruno Mountain (1993)
• Endangered Wildlife (19??)
• Earth Tunes for Kids (1994)
• Composting for the 90's: A Reason and Method for Everyone (1994)
• Whose Woods Are These? (19??)
• Life and Death on the Great Barrier Reef (19??)
• Ice Age: Night of the Sun (19??)
• Understanding Drought and Desertification (19??)
• Understanding Ecosystems (19??)
• Understanding Geysers and Hot Springs (19??)
• Weathering, Mass Wasting, and Erosion (19??)
• Out of the Ozone (19??)
• Life in the Greenhouse (19??)
• Acid Rain and Our Forests (19??)
• Wetlands (19??)
• Saving Endangered Species (19??)
• Extinction: End of the Line (19??)
• Saving Forest Ecosystems (19??)
• Our Disappearing Forests (19??)
• Population (19??)
• World Resource Distribution (19??)

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