VW Jetta does 30MPG in the city, Jeep Wrangler does 22MPG, i.e. 36% more emission. In the winter conditions (e.g. Toronto where I live) Jeep wins hands down. I don't even have winter tires. If you drive kids, the higher and stronger vehicle provides much more safety. Is it worth an extra 36% of pollution? I don't know. But the view that SUVs are just a gas-guzzling marketing ploy is a stretch.