I'm a vegan and have been a vegetarian for about three years because I am concerned about carbon emissions, pollution, and my own health
It's been scientifically proven that veganism reduces one's carbon footprint from 3.3 (omnivore) to 1.3 (vegan). It saves animals from being raised in cramped, smelly, cruel environments and killed. It is also proven that humans were not meant to consume dairy beyond childhood and it is hard for us to digest. It leads to many health problems.