We call it "green" energy because it is environmentally friendly. When we burn oil or gas to produce electricity we pollute the atmosphere with "greenhouse" gases which may cause climate change.
Wind turbines produce no greenhouse gases or any other pollution. Some people say that a wind farm with huge turbines scattered over miles of countryside is "Visual Pollution". They say these things are ugly and spoil the whole area visually.
I suppose it depends on your point of view. Many wind farms are in areas of relatively sparse population. Ergo the do not pollute visually for a lot of people.
We have to decide if the visual pollution is more important than pollution of the atmosphere by conventional fossil fuel powered electricity generators. I personally say it is not. I will take a bit of visual pollution anyday rather than continue to poison our atmosphere.
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