Reasons to become vegetarian

There are different reasons to become vegetarian. Since I am a dietitian I have placed health in number one position but there is no classification. One can be vegetarian for one or several of these reasons, some have very strong feelings towards vegetarism: it happens that vegetarians refuse to be friends with meat-eater, others do not mind. I think that if we want the vegetarian population to grow it is not by avoiding and despising meat-eater that we will do it. On the contrary we should talk to them; if we can at least make them reduce their meat consumption it would be wonderful. If only one person becomes vegetarian after reading this article, it would be worth it.

Health
Ethics and animal rights
The environment
Human hunger
Economy
Religion