[prairiebreeze]

People have been traveling in airplanes for decades. And from continent to continent. I'm not sure just how much of a factor that truly is. Good article though.

Prairie

[GovernmentShrinker]

Crowding is a bigger part of the problem. Despite the wailings of "conservatives" who decry any and all efforts to limit human population growth, it WILL be limited -- if not by human design, then by swarms of little microbes. The former would be less painful, and less likely to strike the most capable and productive members of society, but since we seem to lack the political will and common sense to do it ourselves, the little bugs will do it for us, using their criteria rather than ours.