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WASHINGTON (AP) - Wind farms could generate up to 7 percent of U.S. electricity in 15 years, but scientists want more study of the threat the spinning blades pose to birds and bats.
The towers appear most dangerous to night-migrating songbirds, bats and some hunting birds such as hawks and eagles. The risk is not understood enough to draw conclusions, a National Research Council panel said Thursday in a study requested by Congress.
"The human impacts of wind farms can be both positive and negative," said Paul G. Risser of the University of Oklahoma, who was chairman of the committee that prepared the report.
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