Waterwheel
 
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This tubular matrix on an incline allows juvenile eels climb with ease over a low dam.

This tubular matrix on an incline allows juvenile eels climb with ease over a low dam.

An energy revolution is happening with hydropower - the cleanest of all renewables.

 
 

Hydropower is a direct revolt against (un)natural gas and (un)clean coal power plants.

 
 

And fish are pretty excited to regain access to their ancient spawning areas with thoughtful, scientifically-designed fish ladders.