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The bulk of life on Earth lives in a peaceful place where the temperature is stable. There's hunting going on, but it's very civilized, like a slow ballet.

The human species really could have faced global thermonuclear war. During seventy years of Cold War we grew used to it.

For nearly 2 million years, our ancestors survived and thrived and spread across the planet because they could run other mammals into heat exhaustion.

Again and again, to be sure, on the way to America, and under many other circumstances, man has passed through the most adverse climates and has survived, but he has flourished and waxed strong only in certain zones.

We may achieve climate, but weather is thrust upon us.

Life has evolved to thrive in environments that are extreme only by our limited human standards: in the boiling battery acid of Yellowstone hot springs, in the cracks of permanent ice sheets, in the cooling waters of nuclear reactors, miles beneath the Earth's crust, in pure salt crystals, and inside the rocks of the dry valleys of Antarctica.

The earth's history over the past several million years is that for every 100,000 years, we go through a dramatic climatic cycle where we get 90,000 years of ice age and 10,000 years of a warm period. I think people today just have the expectation that we deserve a perfectly benign climate forever.

We have made great strides, but somehow we've got to create a climate so that everybody can do well, not just some.

Man, in his animal capacity, is qualified to subsist in every climate.

The earth's climate has been changing since God created it, with or without man. On that, we should all agree.