Sometimes, moral and natural goods can conflict. The value of natural "goods" is challenged by such issues as addiction. The issue of addiction also brings up the distinction between economic and moral goods, where an economic good is whatever stimulates economic growth. For instance, some claim that cigarettes are a "good" in the economic sense, as their production can employ tobacco growers and doctors who treat lung cancer. Many people would agree that cigarette smoking is not "morally" "good", nor "naturally" "good," but still recognize that it is economically good, which means, it has exchange value, even though it may have a negative public good or even be bad for a person's body (not the same as "bad for the person" necessarily – consider the issue of suicide.)