Piezoelectric plates are placed under a waterfall, generating electricity without destroying the beauty.-- DesertFox, Dec 19 2004 Sounds like it would be expensive, underpowered, and difficult to maintain. + For keeping with the spirit of environmentalism!-- tiromancer, Dec 20 2004 I don't think DesertFox intention here is "environmentalism" but rather of beauty. There's nothing "environmental" about simply hiding the piezo. I am assuming, the piezos are placed directly on the riverbed.
Riverbed is an ecosystem too, you know.-- neoearth, Dec 20 2004 random, halfbakery