Wind energy often takes a bad rap for its role in bird deaths (though as I’ve posted before, vastly higher numbers of birds are killed yearly by cars, plate glass windows, bridges etc. than by windmills). Neverthless:
SF Chronicle: With 5,000 windmills in a 50-square-mile area, the Altamont Pass is the world’s largest wind farm, producing enough electricity to power 200,000 households annually. But it is also the worst in the country for slaughtering birds.
Environmentalists are not stuck in limbo on wind energy though. Installations like Altamont have become both proving grounds and object lessons for one of the cleanest, most renewable energy technologies we have. Newer towers are much taller, with much larger turbines, both factors that greatly reduce bird deaths by making themselves more visible while spinning, and by spinning above the altitude where predatory birds fly. And, according to the Chronicle piece, we’ve learned that placing the turbines on the leeward side of mountains, we remove them from the paths favored by birds.