Oh not this boring ass thread again 
OP and the others on here bleating nonsense about 'status symbols' and 'showing off', tell me that you don't have any kids (the environmental toll of having even one child is enormous), never fly anywhere, never shop online (TERRIBLE for the environment), never use cosmetics, never drink coffee (TERRIBLE for the environment), eat meat, buy new jeans, etc etc etc and then judge.
I have a 4x4 because I live rurally, on narrow muddy lanes that are often impassable to other cards (my DH drives a sporty BMW and often gets stuck in the winter), in the recent storms I have sailed through deep water other cars could not cope with. I have two dogs, a horse and associated paraphernalia, I also tow a horsebox. I often off-road because I have to. I have a 7 seater which often means taking everyone in my car instead of taking 2 cars.
My car is pretty new and the emission levels are superior to most older cars on the road. I feel absolutely no shame in driving it and never will, I love my 4x4 and will always have one unless I move to a town and give up horses (unlikely).