Alternative energy /  
Rob Waring, series editor 
 - Australia :    Heinle, Cengage Learning,   2010 
 - 24 p. :    ill. ;    21 cm.  
 - Footprint reading library .
<br/><br/> "National geographic" - cover 
<br/><br/><label>ISBN: </label>1424011418  B 
<br/><br/><label>Subjects--Topical Terms: </label><br/>English language -- Textbooks for foreign speakers<br/>Renewable energy sources