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Scientists at the Department of Energy's Oak Ridge National Laboratory have developed lubricant additives that protect both water turbine equipment and the surrounding environment.

They have heating, solar panels and a water turbine.

Including the measurement of streams, the flow of water in pipes or conduits; the horsepower of falling water, turbine and impact water-wheels, wave motors, centrifugal, reciprocating and air-lift pumps.

Press the word on the screen, and presto!, a swirling water turbine appears.

A little further, there was a light in a flour mill, which was grinding away as hard as it could go, being driven by a small water turbine.