Life expectancy for men has increased 4.7 years and 3.5 for women the last two decades of the 20th century. So who are these auto's killing besides the ones in fatal accidents? We're only going to live but so long then something is going to kill us, SARS, cancer, lightning, scorned woman,

, who knows.
Wolf, we do care, or at least I do, but if you could live 200 more years you might see the end of a fossil fuel driven world, and you might see another fractional change in climates, and for sure a few anomalies like the heatwave in France. All in all nature can take care of itself, we are part of it and we must be the best stewards that we can, but you're going to shorten your life more by worrying about it than the actual effects of your environment.