Building thousands of wind turbines would probably not reduce the pollutants that cause smog and acid rain, but it would slow the growth in emissions of heat-trapping gases, according to a study released Thursday by the National Academy of Sciences.
The study found, however, that officials who will decide whether to build the turbines have few tools to measure the devices’ impact on air quality, on animals like birds and bats, and on wilderness preservation.
In fact, making good decisions about wind energy may be difficult, said David J. Policansky, the study director, because negative effects occur locally while benefits are probably regional or national.
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