Environmental ethics :  readings in theory and application / 
edited by Louis P. Pojman. 
 - 4th ed. 
 - Belmont, CA :  Wadsworth/Thomson,  2005. 
 - 678 p. :  ill. ;  24 cm. 
<br/><br/><label>ISBN: </label>0534639712 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Environmental ethics