Follows a trek through the dense rain forests with scientists who gather information about these ecosystems from central Africa to Borneo to Bolivia. Examines the common characteristics of rainforests and their importance in maintaining Earth's biodiversity. Describes the impact of humans on the rain forest, the effects of deforestation, and the need to preserve the rain forests while balancing the needs of the people who live there.

Introduction: a wild, green world -- Trekking through the Congo -- Borneo's forest orangutans -- Bolivia's wild Madidi -- Preserving the rain forests -- Problem solving think tank: improvising to solve a problem -- Science notebook -- Glossary.