But then that's silly. Would it be better if they were doing the school-runs in sedans? Hatchbacks? pickups? We can argue that a small hatchback would have marginally smaller emissions than a modern SUV, but then it's the wrong thing to focus on, we should be trying to get these people off the road, not pondering about SUVs.
Personally, I hate SUVs because they are really shitty cars. Heavy, high center of gravity, high consumption, ugly (IMO), not even much storage space.