The cost of wind power in Scandinavia is dropping as technology improves and competition mounts, but a new challenge may be overcoming public objections that modern windmills are eyesores. Denmark, which generates about 10 percent of its electricity from wind and aims to raise that percentage to 50 by 2030, plans to build all of its new windmills off-shore because the public is starting to oppose the sight of windmills in the countryside. Norwegian energy expert Atle Midtun: “This is likely to be the main obstacle for wind power — to make people accept living close to the rotating blades from wind turbines.”