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Politics : Formerly About Advanced Micro Devices -- Ignore unavailable to you. Want to Upgrade?

To: Tenchusatsu who wrote (288625)	5/22/2006 5:24:12 PM
From: tejek	Read Replies (1) \| Respond to of 1571011

Z, After you breach a dam, you can build another one elsewhere. Huh? As far as I know, they weren't going to move the dams. Plus there are only so many rivers you can build dams on, and of course each time you do it you affect the local ecology in some way or another. They don't move or rebuild the dams because many of them have lost their effectiveness. Either the reservoirs behind the dam have built up with silt and other impediments, or the dam structure has grown fragile with age [see New England], or that so many dams have been built on the river, water flow has slowed and the dams have become redundant and provide little power [remember....to generate electricity, the river water must run fairly fast........that doesn't happen when a river is overrun with dams.] Each dam teardown is well thought out before its taken apart. Because salmon are an endangered species, new dams are required to put in fish ladders to accommodate their annual migration to and from the ocean. friendsoftheriver.org After you destroy a species, you can't bring it back. They're already filling the rivers with hatchery salmon. Funny thing is that "they" (I don't who "they" are, so don't ask) don't want the hatchery salmon to interbreed with the wild salmon. There was one time when they clubbed a bunch of salmon because of such interbreeding. That's saving a species? "Clubbed a bunch of salmon"? Was that in the latest chainsaw massacre movie? If they clubbed any fish, it was the hatchery fish and not the wild salmon. The hatchery salmon are not endangered; the wild salmon are. The hatchery salmon carry diseases that the wild salmon can't handle; plus, when the two fish interbreed, the characteristics that make the wild salmon more desirable are lost. ted