Re: Marketing Change?
That's the same reason an MRI is called a Magnetic Resonance Imaging, because 'magnetic' sounds considerably less scary than 'nuclear' (as in Nuclear Magnetic Resonance Imaging, to give it it's full title).
Organic Energy sounds a little too far, people might look up what it means, I suggest something obviously scientific but not obviously scary. How about 'Particle Energy'?
N.B. I think the 'no nuclear' message largely carried over from the 'no nuclear weapons' message, which is a different subject altogether.