This article reminded me of the concept or an airborne turbine [0]. Interesting to think what would happen if we had thousands or more of these immersed in jetstream somewhere, siphoning terawatts. Environmental impact could be noticeable (or not) [1].

[0] https://en.wikipedia.org/wiki/Airborne_wind_turbine [1] https://en.wikipedia.org/wiki/Jet_stream#Possible_future_pow...