Schaufele, Christopher. <br/><br/>
Earth algebra :  college algebra with applications to environmental issues / 
Christopher Schaufele, Nancy Zumoff. 
 - New York :  Harper Collins,  c1993. 
 - xix, 364 p. :  ill. ;  25 cm. 
<br/><br/> Includes index. 
<br/><br/>Includes bibliographical references. 
<br/><br/><label>ISBN: </label>0065008871 (hbk.) 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Carbon dioxide--Environmental aspects--Mathematical models.<br/>Global warming--Mathematical models.<br/>Algebra--Study and teaching.