Here is an idea from the “Why didn’t I think of that” department. Leviathan Energy has developed the “Benkatina” turbine that would reportedly generate power from the downward movement of water through pipes in a municipal system. In other words, it is possible to produce energy simply by flushing the toilet. The idea is not new, the West was built on hydroelectric power. It is just the location and scale of the turbine that is innovative.
Leviathan Energy also produces wind turbines and wave energy systems. I predict the company will soon be flush with success.