Hydroelectric: sustaining nature's bounty 

 - Ontario:  Ontario Hydro,  [1997] 
 - 8 p.  cuadros. 
<br/><br/>05843 
<br/><br/>Renewable, sustainable hydroelectric energy was Ontario Hydro's founding power source almost a century ago. Today it is one of hydro's most cost - efficient businesses and a significant part of Ontario's heritage. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Centrales Hidroeléctricas
<br/><br/><label>Subjects--Geographic Terms: </label><br/>Canadá
<br/><br/><label>Dewey Class. No.: </label>621.312  / O591