I've never had a car, i've still left an horrendous footprint on the planet. As has everyone on here. We can, in off topic, debate about how crap it is that as a society we are so reliant on cars and other transport but in a lot of cases we have little choice.
Tomorrow as an exmple, I am going to a funeral. I've booked a taxi to get to the train station in town as I can't be doing with the bus before it, then a train, then i'll be picked up and go to someone's house. Then we'll drive to the crem, then drive to the wake, then i'll be dropped back at the station, train back and then most likely a taxi home for the same reason as getting one into town. That's all pretty crap for the enviroment but for me it's a necessity as the person was very important to me.
Cars, trains, planes, boats, buses etc are a necessary evil. Gambling as a whole is just evil. And I say that as someone that would have been classed as a fairly 'successful' gambler as I was well in profit.