On a particularly windy day (last Thursday), the country of Denmark was able to meet its domestic electricity demand and even export power to Norway, Germany, and Sweden thanks to its wind farms. As The Guardian reports, Denmark found itself producing 116% of its national electricity needs from wind turbines, and by 3 AM the next morning (Friday), when electricity demand dropped, the figure had risen to 140%. 

80% of the power surplus was shared equally between Germany and Norway, which can store it in hydropower systems for later use. Lucky Sweden received the remaining fifth of excess power.

Said Oliver Joy, a spokesman for trade body the European Wind Energy Association:

"It shows that a world powered 100% by renewable energy is no fantasy. Wind energy and renewables can be a solution to decarbonization – and also security of supply at times of high demand."