This is probably the finest piece on global climate change that I've read. It's a three part piece in the New Yorker by Elizabeth Kolbert. Unfortunately, only two of the parts are online. Fortunately for me, Zoe has a dead tree subscription. Read the interview with Elizabeth Kolbert and the first two parts on line and make a trip to your local library.

A Planetary Problem

AMY DAVIDSON: What is global warming? Is it real, or theoretical? ELIZABETH KOLBERT: I guess you could say that that depends on what the meaning of the word “is” is. The principles of global warming are as well established as any in physics. Nearly a hundred and fifty years ago, a British physicist named John Tyndall discovered that certain gases in the atmosphere—we now refer to these as “greenhouse gases”—trap heat on earth by absorbing infrared radiation. There are several naturally occurring greenhouse gases, including carbon dioxide and water vapor, and together they produce the so-called “natural greenhouse effect.” Without the natural greenhouse effect, the planet would essentially be frozen. Any basic earth-science textbook talks about the natural greenhouse effect; it’s a phenomenon that is not in any way debated. All that the theory of global warming says is that if you increase the concentration of greenhouse gases in the atmosphere, you will also increase the earth’s average temperature. It’s indisputable that we have increased greenhouse-gas concentrations in the air as a result of human activity, and it’s also indisputable that over the last few decades average global temperatures have gone up. As best as can be determined, the world is now warmer than it has been at any point in the last two millennia, and, if current trends continue, by the end of the century it will likely be hotter than at any point in the last two million years.

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THE CLIMATE OF MAN—I

The Alaskan village of Shishmaref sits on an island known as Sarichef, five miles off the coast of the Seward Peninsula. Sarichef is a small island—no more than a quarter of a mile across and two and a half miles long—and Shishmaref is basically the only thing on it. To the north is the Chukchi Sea, and in every other direction lies the Bering Land Bridge National Preserve, which probably ranks as one of the least visited national parks in the country. During the last ice age, the land bridge—exposed by a drop in sea levels of more than three hundred feet—grew to be nearly a thousand miles wide. The preserve occupies that part of it which, after more than ten thousand years of warmth, still remains above water.

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THE CLIMATE OF MAN—II

The world’s first empire was established forty-three hundred years ago, between the Tigris and Euphrates Rivers. The details of its founding, by Sargon of Akkad, have come down to us in a form somewhere between history and myth. Sargon—Sharru-kin, in the language of Akkadian—means “true king”; almost certainly, though, he was a usurper. As a baby, Sargon was said to have been discovered, Moses-like, floating in a basket. Later, he became cupbearer to the ruler of Kish, one of ancient Babylonia’s most powerful cities. Sargon dreamed that his master, Ur-Zababa, was about to be drowned by the goddess Inanna in a river of blood. Hearing about the dream, Ur-Zababa decided to have Sargon eliminated. How this plan failed is unknown; no text relating the end of the story has ever been found.

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