Salt water can burn

If you put salt water into a specific micro-wave field, it will produce H2 and O2 which can be burnt and produce water again.
Now of course what matters is the energy balance of the whole thing :)
Because indeed if the energy you need to spend on the micro-waves is equal or higher than what you get by burning the produced hydrogen you did not create anything.
But let's see where the coming research on this will take us and maybe we can get something useful out of this discovery.

The article at National Geographic is here.