Ugh, you call that a utopia? Imagine what traffic will be like in 30 years with a world population of 9 billion and everyone having their own car. Imagine how much space will be needed just for parking all these vehicles? Also, I have to say that I don't think Tweev is trying to convince anyone to do things he/she has listed. He's just pointing out that out of all the things you can do to benefit the environment, buying a Prius is very low on list.