It's a natural history.

It's a natural history, my friends, purely natural. Perhaps it is a natural history of the UNnatural, so to speak. Dump the chemicals in there, mix it all up, I'm sure it'll do no harm. Just let it sit for a few decades and it'll be perfectly safe, I assure you! No, Ma'am, I'm sure your five limbed child was not a result of building your home on this property! It's them darn people..puttin' somethin in yer genes. Ain't my fault.