Cool footage, at any rate.
H/T Planet Gore
Yep, the wind and the sun are free. Wind power and solar power are bloody expensive. Coal under your land is as free as the wind that blows across any parcel suitable for wind- or solar-energy production: It takes money to convert all three of them to energy, and only one of them can be converted economically.
There’s plenty of energy in the world… The trick is being able to capture, store, and transport it efficiently.