Greenpeace has been butting heads with an unlikely foe for the past few years.  Long time environmentalist, Robert F. Kennedy, Jr. is usually a stand up guy when it comes to the environment.  He's an enthusiastic supporter of clean energy projects like windfarms, unless - of course - they scar the view from the Kennedy Compound in Cape Cod.  Check out this article in Grist Magazine that spells out the issue quite nicely.