I don't own a car. I also think climate change is similar to fighting obesity: "you must change your behavior today or something will kill you in x years"
Usually people have a wake up call(cardiac event, can't run up stairs without being winded, etc), before they get really serious about weight loss. What would be a similar wake up call for the planet? People don't attribute floods and stuff to climate change, so therefore it's not a wake up call.