Using the appropriate microwave hz frequency, plastic is broken back down into oil. This is a process that can be used to modify the chemical structure of materials. Wave energy can be used to change the chemistry of molecules into other molecules.
The appropriate frequency could also change an atom into another kind of atom.
It could change HOH into HHO. This article by Global Resource Corporation shows that we can move water into fuel, and that infrastructures are placing investment into using that to extend oil and pollution instead of produce efficient and clean energy.
Mop it up.