From Barton, Vermont, to the German border with Denmark and from the shores of Lake Huron, to the Romney Marches of southern England, wind power advocates are fighting crosswinds from local residents. In Barton in mid-January, a referendum overwhelmingly rejected the wind power turbines that were planned near this upper Vermont community. ...In Germany, where one-third of the world's current wind power is generated, doubters have provoked a loud debate. The company that owns the grid that includes nearly half the wind-farms in Germany reported its wind farms generated only 11 percent of their capacity. The company said the winds vary so much the wind farm had to be backed 80 percent by the conventional power grid.