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When we see huge solar power plants and offshore windmills being built, it's easy to forget how long it took before big energy companies were willing to invest in this technology. Advocates of tidal energy now face a similar problem.There is copious energy in waves and tides -- enough to supply all of humankind's power needs. Scientists all over the world are experimenting with small tidal and wind generators. One of them functions like an underwater windmill: the currents turn the rotor blades, which drive a generator.
When we see huge solar power plants and offshore windmills being built, it's easy to forget how long it took before big energy companies were willing to invest in this technology. Advocates of tidal energy now face a similar problem.There is copious energy in waves and tides -- enough to supply all of humankind's power needs. Scientists all over the world are experimenting with small tidal and wind generators. One of them functions like an underwater windmill: the currents turn the rotor blades, which drive a generator.
