windmills

A Wall Street Journal article on this discusses measures that are being considered in some places to get rid of the blinking red lights on top of wind farms. Might be paywalled, but you can probably google the article and open it (WSJ: "Lawmakers Crack Down on Wind Turbine Lights That Flash All...

The Oklahoma legislature has removed setback distance requirements from private airports that once required a 1-1/2 mile setback from a runway for windmills. The FAA and the Oklahoma Aeronautics Commission are also permitting unlit windmill construction. As a result, there are unlit windmill...