wind 400 TW
Winds are driven by sun radiation. Earth receives about 1e17 W of it, about 1e16 W is absorbed by atmosphere. If all of this is used for driving of winds with temperature difference of 10K, in perfect Carnot cycle it makes only 3e14 W or 300 TW. In reality, temperature diferences are much lower, solar power is spred over cold and warm places, there are friction, losses in turbines, evaporation, mixing of air, wave-making, photosynthesis, buffering by land and sea, etc. etc. Even 10% of this 300 TW is obviously too much, several percent max is more realistic. So these 400 TW are pure fiction.
