Wind energy is on the up globally with 1000 GW likely to be in place soon. Longer term, if on-land and offshore sites get congested then there is the prospect of using airborne wind-energy devices or tethered kites that operate at high altitude.

Wind energy is on the up globally with 1000 GW likely to be in place soon. Longer term, if on-land and offshore sites get congested then there is the prospect of using airborne wind-energy devices or tethered kites that operate at high altitude.