Have a look at travel and how many times you use the car with just you in it.
Are we prepared to use trains at all?
It seems carbon fuel and meat consumption are the two main consumables that could most dramatically impact positively if we were to reduce.
So if you do not want to be vegetarian, them consider seeing meat as social food, and eat it as if it was medicine. reduce the quantity and consider the sources. There is a huge amount of suffering in meat production as well as the environmental impact.