Actually, this is a misuse of the word "natural". In reality, Hoover Dam is every bit as "natural" as a beaver dam -- the former was not created or maintained by mystical powers, and human rational thought is no less valid than beaver instincts.
"Natural" and "organic" are mystical concepts for the mystical.
I gave up trying to convince such people 35 years ago when one insisted that there just had to be a difference between identical molecules of an active form of vitamin, one synthesized, and the other from a "pure and natural organic source". These people think molecules have souls.