Petersen, Christine. <br/><br/>
Preserving the living earth / 
Christine Petersen. 
 - New York :  Marshall Cavendish Benchmark,  c2012. 
 - 112 p. :  ill. (chiefly col.), col. map ;  24 cm. 
 - Environment at risk .
<br/><br/>Includes bibliographical references and index. 
<br/><br/> "Provides comprehensive information on Earth's various ecosystems, their importance, and the environmental threats place upon them"-- 
<br/><br/><label>ISBN: </label>9781608704804 (pbk.) 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Biotic communities.<br/>Environmentalism.<br/>Environmental degradation.
<br/><br/><label>Dewey Class. No.: </label>577