Offshore wind farms cost significantly more to build and maintain than their onshore equivalent. And because they involve new and untested technology they also suffer from "first of a kind" costs. But the industry is confident that those costs will fall over time. It is difficult to compare the cost of electricity obtained from a wind farm rather than a conventional energy source like gas. This is because it involves assumptions about future construction costs, the cost of carbon emissions, and the cost of gas. However, right now offshore wind farms are significantly more expensive than thermal generation and require a government subsidy to make them economic.

Over the last two years, researchers studied hundreds of bat carcasses found under wind turbines and dissected them to determine the cause of death. Supervised by U of C biology professor Robert Barclay, the researchers determined the majority of bats killed suffered from barotrauma­-- physical damage caused by a difference in pressure inside and outside the body. Barotraumas affect respiratory systems when air pressure suddenly drops, causing the lungs to over-expand. Only 10 per cent of bat deaths come from collisions with wind turbines.