Orr, David W.,  1944- <br/><br/>
Hope is an imperative :  the essential David Orr / 
David W. Orr ; foreword by Fritjof Capra. 
 - Washington, DC :  Island Press,  2011. 
 - xx, 369 p. ;  23 cm. 
<br/><br/>Includes bibliographical references and index. 
<br/><br/><label>ISBN: </label>9781597267007  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Environmental quality.<br/>Sustainability.<br/>Environmental education.<br/>Human ecology.<br/>Sustainable design.<br/>Environmental engineering.<br/>Global environmental change.<br/>Climatic changes--Environmental aspects.
<br/><br/><label>LC Class. No.: </label>GE140  / .O77 2011 
<br/><br/><label>Dewey Class. No.: </label>333.72 ORR