m26.    How is hydroelectric power used?

Large hydroelectric scale projects build large dams across large rivers to create reservoirs. The US is the world's largest producer of hydroelectricity; 10% of all electricity used in the US and 3-5% of all commercial energy.  

e07.    What is the Wild and Scenic River System?

e19.    What materials can cause water pollution?

g06.    What are some of our energy resources?

g08.    What are the spheres that make up the earth?

g13.    What makes up earth's climate?

g18.    What is energy?