Hi, great info.....just a point of technical correction - there is no machine that can break the law of thermodynamics by producing more energy than it consumes. What you should say is the machine produces more useful work or energy than YOU the owner or user put into it by yourself, at some cost. This means that other sources of energy not controlled or PUT by the use contributed in the performance of the machine. This is the reason why scientists end up arguing - lack of clarity.
Consider a solar panel, it may be 17% efficient relative to the total energy that hits it from the sun but since you the user did not input or pay for the sun's power (it is free) then your co-efficient of performance is almost infinity! The earth is a perpetual motion 'device'. so is the sea and most rivers. They are always moving. Now, just because you do not know what moves a thing does not mean that nothing is moving or energizing it.
I am elated to see that some Nigerians are thinking beyond oil...