"Earth is a complex system of natural cycles. Carbon, water, and other materials move in and out of rocks, the air, bodies of water, and living things. But human activities have thrown these cycles out of balance. In [this book], learn how Earth's living and nonliving things are connected and how human activities have damaged that connection." -- Back cover.
Includes bibliographical references and index.
Cycles in nature -- The carbon cycle -- Overloading the carbon cycle -- Conclusion.