Airborne wind power is catching up fast. There are good reasons for the flying wind farms to be powerful electricity generators, since they are up with more consistent and stronger winds. Construction wise they need lesser material than a conventional turbine, it is also less expensive to build and install.
A study found that
wind turbines placed on Earth's surface could extract kinetic energy of at least 400 terawatts (trillion watts), while high-altitude wind power could extract more than 1,800 terawatts. The latter is about 100 times greater than the world's current power demand.
"NASA's version is a kite-device which involves a generator on the ground gathering energy from the tether of the kite as it catches the wind.
The flying turbines have little or no environmental or noise impact"
Info source: Makani PowerTelegraph.co.uk