In the following article, Norwegian historian Stephan Sander-Faes highlights recent reports that damage to wind turbine rotor blades could release not only sharp-edged, larger fragments but also very fine, respirable fiber dust from carbon fibers, so-called "nasty fibers." 

These fibers are as carcinogenic as asbestos and can get into our bodies through our skin and our lungs.  It is not only humans that these fibers pose a risk to, it is animals as well.

They have known about these "nasty fibers" emitted from windmill blades for over a decade.

By Epimetheus

We've heard a lot of concerns and protests about windmills, ranging from emotional pleas (they kill animals) to conservationist notions (they are ludicrously expensive to build), and from ecological concerns (just think about all the energy and raw materials to build them) to their questionable "sustainability" (what happens with them when the wind doesn't blow).