Describes the course of the largest river in North America, the Mississippi and the connections between the plant and animal species that live in and around it.

Provides an overview of the rain forests of the world and describes the rain forests of the Pacific Northwest and the life that they support.

Simple text explores how insects, birds, and other animals find food and make their homes among the plants of a garden.

Simple text describes the plants and animals that inhabit a stream, creating an interrelated ecosystem.

Explores the desert ecosystem, discussing where deserts are found, how a desert develops, and how plants, animals, and people survive in this harsh environment.

Describes this western North American mountain range's ecology, discussing formation, geography, climate, and plant and animal life.

An introduction to rain forest ecosystems, describing the role of rain forests in producing the world's oxygen, food, medical ingredients, and other raw materials used in everyday life throughout the world.

An introduction to arctic ecosystems, describing the plants and animals native to arctic regions, and discussing threats to the Arctic and its importance to the rest of the world.