A fierce legal battle is under way in Scotland, involving U.S. tycoon Donald Trump.
At the heart of the wrangle: wind.
Europe is leading the way in generating energy using wind. Huge turbines whir away on the hills and in the seas throughout the continent.
The roots of Trump's hatred for these turbines can be found, at least in part, in what was once a stretch of rolling dunes and grassland in northeastern Scotland, overlooking the North Sea.
He is spending hundreds of millions creating a resort there.