Certainly not every wind turbine. Everything that humans do has some level of impact, but let’s keep things in perspective. For every 10,000 birds killed by human activities each year, 10% are killed by house cats, 14% are killed by power lines, about 58% are killed by collisions with other structures, such as office buildings, house windows etc. Current research suggests that around .01% of birds are killed by wind turbine collisions – approximately 1-2 birds per turbine per year. To put this in raw numbers, in North America, about 500,000,000 birds die annually from building strikes, and 25,000 die from wind turbine strikes. It’s safe to say roughly one high-rise office building kills more birds than all of the wind turbines in North America put together.
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