wind turbines

Coal currently generates approximately one third of Danish electricity needs, but is targeted to be phased out entirely within ten years. In addition, wind turbines are set to generate approximately one half of all Danish electricity needs by 2020.

Image © wikimedia

Denmark is already one of the greenest countries in the world and, according to the Map of Happiness, one of the happiest as well.  Maybe the two go hand in hand?

Read more at io9.