The noganist movement. Noganists do not even eat plants, for plants can feel sadness and happiness, contentment and pain - anyone with a heart can see this.

Therefore, and just to be sure, noganists only eat molecules electromagnetically reassembled from anorganic matter.

Since this is presently only a scientific dream, noganism is more of an ideal than a practice, but the noganist movement will not cease to research until there is not a single blade of grass getting trampled upon.