I don't often drive (<1000 miles a year) and I'm not having kids. That reduces my environmental impact massively.

Health-wise, it would be incredibly difficult to manage a meat free diet with my existing medical conditions (I can't eat any foods with tyramine, so for example anything containing soy, anything fermented, etc).

As for livestock welfare, I would rather accept that animal husbandry is here for the long term and push for higher standards.