Green energy is always good energy, right? Well … not so fast. Although wind power is one of the world’s fastest growing energy technologies, the machines involved are dealing lethal blows to some of our flighted friends.

Wind turbine generators often soar to 400 feet, where birds can collide with blades spinning up to 160 miles per hour. Bats face a double whammy from blade strikes and fatal low pressure changes created by the blades’ powerful forces. When dozens of wind turbines over hundreds of acres are factored in, the result is bad news for tens of thousands of birds and bats each year.

Debate over the regulation of wind energy production continues among government agencies, wind farm operators and environmental groups. Where do you stand on this energy versus ecology controversy?