Big Wind hides evidence of turbine bird kills and gets rewarded. Here is how they do it. In 1984 the California Energy Commission .. the primary environmental issue alluded to was the extreme hazard that wind turbines posed to raptors. ... Since the early 1980s, the industry has known there is no way its propeller-style turbines could ever be safe for raptors. With exposed blade tips spinning in open space at speeds up to 200 mph, it was impossible. Wind developers also knew they would have a public relations nightmare if people ever learned how many eagles are actually being...