As we live and breathe :  the challenge of our environment. 
Foreword by Gilbert M. Grosvenor. Prepared by the Special Publications Division, National Geographic Society. 
 - Washington :  [National Geographic Society,  1971] 
 - 239 p.  illus. (part col.)  26 cm. 
<br/><br/> A collection of essays by various authors. 
<br/><br/>A people at war with their land;<br/>Ecology, the intricate web of life;<br/>Agriculture: the price of plenty;<br/>Energy: a crisis in the offing;<br/>Industry: perils of production;<br/>Transportation: nation on the go;<br/>Urbanization: the great migration;<br/>Waste: the burden of affluence;<br/>Population: a look to the future;<br/>Concerned people: key to tomorrow<br/> 
<br/><br/><label>ISBN: </label>0870440977 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Human ecology.<br/>Nature--Effect of human beings on.
<br/><br/><label>Dewey Class. No.: </label>301.3/1  / G4641