It's an idea that most of us would rather not think about, but within the next century, life as we know it could come to an end. Our civilization could crumble, leaving only traces of modern human existence behind. It seems outlandish, extreme, even impossible. But according to cutting-edge scientific research, it's a real possibility, unless we make drastic changes now.
Human beings -- Effect of climate on.
Nature -- Effect of human beings on.
MPI Home Video (Firm)
Woodruff, Bob, 1961-