Circle of life

Describes the numerous plants and animals that live in the Brazilian rain forest and their ecological and economic importance.

Describes the life cycles of Douglas Firs in the Pacific Northwest as they relate to ecological issues such as species diversity and air and water filtration.

Explores the plant and animal life found in the Arctic National Wildlife Refuge on the Alaskan tundra.

Examines the plants and animals of Hawaii, discussing such elements as species diversity, endangered species, and conservation efforts.