Table of Contents
Planet Earth: 25 Environmental Projects You Can Build Yourself

Introduction

Planet Earth
Our Ecosystem

Part I
Understanding Our World
Earth: Our Spot in Space
Air, All Around Us
Water, Water Everywhere
Our Star, the Sun
Life on Earth
Pollution

Part II
The Problems the Environment Faces
Global Warming
Ozone Depletion
Nature at Risk
Recycling
The Balance of the Environment

Glossary

Resources

Index