pollution

Discusses the different types of air pollution and how they can be stopped or reduced.

Examines acid rain, its effects on the world, and possible ways of stopping such damage.

Details the various types of land pollution and possible ways to prevent them.

Abigale comes up with a big idea to prevent Land People from polluting the sea.

Wilson starts out painting a picture of a beautiful world but keeps adding so many people and cities that soon his world is not fit to live in.

A very simple look at such problems as pollution, hunger, and loneliness and what can be done about them.

Discusses the importance of the layers of earth's atmosphere and the need to prevent air pollution.

Text and color photos present the causes and effects of air pollution, covering acid rain, greenhouse gases, flooding, and other related topics.

Examines the main types of largescale habitats found in the world, as well as smaller types, and shows what is happening to them.

The inhabitants of a coral reef are threatened when a shady real estate deal started by the greedy Groper floods their area with poisonous waste.