Wind turbine construction noise is killing ocean mammals such as porpoises, dolphins and whales, by damaging their hearing. Without proper hearing abilities they can't hunt or conduct other life-sustaining activities. Up to 200 decibels have been registered during construction.
There are ways to create a bubble curtain around the worksite, so as to prevent noise propagation, but this technology is rendered useless by strong currents.
Read more here: http://www.thelocal.de/sci-tech/20130226-48201.html
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