+1 for trying the vegan diet If you do this, please go to restaurants and request a vegan meal. The environmental benefits of the vegan diet are well-documented. The best way to enact change is to get restaurants to start listing vegan options.
I do not believe that Veganism is healthy at all. Vegetarianism with a correct diet (and only then) can be, but the human body isn't fit for a vegan diet in the long run. I respect your choice if you do it, but at large it's just not reasonable. Oh, and something slightly offtopic: if you have children, do not raise them with a vegetarian or even vegan diet. That should be classified and punishable as child abuse.
That's ridiculous. Would you not agree that vegetarian people are likely to be more conscious of their nutritian than the average person?
Here's an anecdote. I know three children brought up in vegetarian* family. All three were high achievers academically and athletically. It's worth noting that their mother was very conscious of nutrition, and did give them supplements.
*Pescatarian, actually. Though many pescatarians call themselves vegetarian, including this family.