Take a hullaballoon drive and orient it vertically so that the balloons travel skywards when inflated and return to Earth when not. Mount the whole thing so that it has some clearance above the ground, and place a filling station at the base. Finally, hook up a turbine to the balloon conveyor belt in order to extract from this contraption energy in the form of electricity.
-- Cuit_au_Four, Mar 22 2017

Hullaballoon Hullaballoon
I'm sure everyone is familiar with this one. [Cuit_au_Four, Mar 22 2017]

What's the energy source?
-- notexactly, Mar 28 2017



random, halfbakery