What we have lived through, the 20th century, has been like a great party. Adults now have had the best time humanity has ever had. Now the party is over and the Earth is reckoning up.

An inefficient virus kills its host. A clever virus stays with it.

Climatologists are all agreed that we'd be lucky to see the end of this century without the world being a totally different place, and being 8 or 9 degrees hotter on average.

No one who has experienced the intense involvement of computer modeling would deny that the temptation exists to use any data input that will enable one to continue playing what is perhaps the ultimate game of solitaire.

A billion could live off the earth; 6 billion living as we do is far too many, and you run out of planet in no time.

Let's make hay while it lasts.

Nature favors those organisms which leave the environment in better shape for their progeny to survive.