The article did a decent job of explaining that fact without giving off a holier-than-thou, savior complex vibe. Surely you can see why that is a better approach than shaming people, especially when it's so easy to point out other ways in which a vegan might have a larger than necessary carbon footprint. The person I responded to is only interested in being smug, not educating people or genuine change. That's not environmentalism it's just a prime example of virtue signaling.