One real good volcanic eruption or a meteor hit and none of the global warming, fuel consumption, or any other great problems will matter much. Even a little old lady in a ford comet can take me out while I am thinking about all the worlds problems and not paying attention.
I want to thank all the experts and scientist that are working on problems and trying to make things better. This has to be a tough job and I would not know where to start. For now I am going to ride my bike and hope that the powers to be don't decide that it is illegal to ride.