As an increasing number of states are demanding more use of renewable energy, conservationists are beginning to take a closer look at how this is impacting the natural world. Nowhere is this seen more dramatically than in West Virginia and Pennsylvania, where the erection of large wind turbines is spelling doom for thousands of bats. According to a recent article in the Washington Post, researchers estimate as many as 4,000 red and eastern pipistrelle bats have been killed at the Backbone Mountain facility alone in West Virginia. This has had a profound ecological impact, as these bats are starting to decline in number and are important because they eat insects which devour crops and can spread disease. A difficult dilemma, indeed.