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Politics : The Castle
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To: TimF who wrote (2946)3/4/2004 3:01:21 PM
From: The Philosopher  Read Replies (1) of 7936
 
Hydro is mostly tapped (at least in the US) except possibly tidal power.

In fact, Hydro in the Northwest will probably go down as more environmental regulations a) require the destruction of more dams to restore salmon spawning grounds, and b) require that water flows be regulated to give priority to salmon runs over electricity generation.

Tidal sounds good in theory, but in practice will be extremely, extremely difficult to do in an environmetally acceptable manner. Interrupting tidal flows will have major potential impacts on spawning grounds for many species, plant growth, etc. In addition, maintenance of any underwater structure that has moving parts (as the turbines would have to) is complex and costly. Just imagine what fun mussels would have attaching themselves to turbine blades. (To gauge the impact of mussels, consider the problem of Zebra mussels in the Great Lakes.)
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