"It went from an issue that wasn't on the industry's radar as being a concern to one that is blocking projects," says Michael Walsh, chief executive of the Irish Wind Energy Association. "That policy will have a material impact on the number of megawatts built this year." Turbulence caused by trees, which can affect the efficiency of the wind turbines, is not the main problem, explains John Brereton, general manager of Wind Prospect Ireland. "The real problem is if you have trees next to turbines it can impinge on your warranties," he says.
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