So is global warming....
Tobacco smoking is also highly addictive because smokers become addicted to their smoking behaviors and rituals.
It is an habituation, or at least it was until the same brainiacs who determined homosexuality wasn't abnormal changed the definition of addiction to include habituation in order to include smoking as addictive behavior.
When I have a craving for a ripe tomato is it because I'm a nicotine addict? Or just love ripe tomatoes? How about the baked potato I had with my dinner tonight, was my need for the potato instead of rice because of an addiction?
So is global warming....
Global warming is real. So is global cooling. Blaming it on humans, however, is the height of junk science. Your suggestion is in no way analogous to nicotine being highly addictive.
Smokers can absolutely be behaviorally addicted to smoking. The aroma of smoke can be addicting as well as the feeling of actually inhaling the smoke. I know lots of people who have to have a smoke after eating, when they drink, after sex and on and on.
Comparing nicotine addiction to food cravings means you're not being serious, and it is a serious issue. The word "addiction" is used very loosely today -- as when people claim they are "addicted" to exercise, chocolate, or the internet. Addiction is a medical term referring to compulsive, habitual use of a substance that has physiological effects but is not necessary for survival. Addictive substances produce tolerance (meaning that it takes an increasing amount of the substance to produce the desired effect) and physical dependence -- and unpleasant symptoms of withdrawal if use is discontinued. The nicotine in cigarettes fits all these criteria. Food does not.