One earth

Describes the multitude of life found in and around the sea and how that life is being endangered by marine pollution.

Discusses the characteristics and importance of different kinds of forests and the life they support.

Describes the lifestyle and habitat of the grizzly bear, how the destruction of forest land threatens its survival, and what we can do to save the grizzly.

Explores wetland habitats such as lakes, rivers, ponds, and streams and the endangered wildlife that live in them.

Explores prairie and grassland habitats and the species of endangered plants and animals that live in them.

Discusses the characteristics, animal life, and importance of oceans and coastal areas and ways to protect these habitats.

Describes the lifestyle and habitat of the prairie dog and black-footed ferret, how the destruction of the grasslands threatens their survival, and what can be done to save the animals.

Describes the lifestyle and habitat of the swan, whooping crane, and loon; how the destruction of wetlands threatens their survival; and what we can do to save the animals.