That's amazing.

But as good as it sounds, it's not as easily replicable in another country. Denmark's population is 5.6 millions while, for example, UK is 64.1 millions. Which means UK people would need 11.5 times the wind power of Denmark to be self-sustainable.

We don't understand what "electricity needs" refers to. Is it energy consumption by households ? Is it energy consumption by households and companies ? Does it includes transport (cars, planes, freight, train), heating and cooling, food, manufacturing ?

For example, the UK can't only live on renewables (this book is really great and go in-depth about our energy consumption/production http://www.withouthotair.com/ and explains it).