Current literature has them somewhere between a very small negative feed back and a small positive feedback, with a most - likely value of a very small positive feedback. (realclimate.org)
So, let's see if I've got this straight: people don't live in the clouds therefore clouds are a big negative feed back. (illconsidered.blogspot.ru)
«Because we found changes in the brain as a consequence of binge eating that were predictive of decreased myelination, therapeutically promoting remyelination may represent a novel treatment avenue for promoting recovery from negative feeding behaviors in eating disorders,» explained corresponding author Camron Bryant, PhD, assistant professor of Pharmacology and Experimental Therapeutics & Psychiatry at BUSM. (sciencedaily.com)