We can't just spontaneously arrange atoms for free. Turning, say, lead into gold is possible, but consumes a lot of energy for a very small result. Some transfo

We can't just spontaneously arrange atoms for free. Turning, say, lead into gold is possible, but consumes a lot of energy for a very small result. Some transformations are effectively "one-way". It's all nice to say "it's just a bunch of atoms", but some toxic compilations of atoms can't (without more "one-way" transformations to tap the available chemical energy) be easily transformed back into useful combinations.