Wright, Richard T.,  1933- <br/><br/>
Environmental science :  toward a sustainable future / 
Richard T. Wright. 
 - Ninth 
 - Upper Saddle River, N.J. :  Pearson/Prentice Hall,  c2005. 
 - xxiii, 712 p. :  ill. (chiefly col.), maps ;  29 cm. +  1 CD-ROM (4 3/4 in.)