What evidence shows that fish ladders and hatcheries don't work well?

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What evidence shows that fish ladders and hatcheries don't work well?
Water is polluted
Fish have deformities
O Fish ladders are to complicated and hatchery fish don't survive
O There are fewer fish in rivers with dams
O The World Wildlife Federation said so.
Transcribed Image Text:What evidence shows that fish ladders and hatcheries don't work well? Water is polluted Fish have deformities O Fish ladders are to complicated and hatchery fish don't survive O There are fewer fish in rivers with dams O The World Wildlife Federation said so.
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