The cover of The American Scholar quarterly carries an impertinent assertion: “The Earth Doesn’t Care if You Drive a Hybrid.” The essay inside is titled “What the Earth Knows.” What it knows, according to Robert B. Laughlin, co-winner of the 1998 Nobel Prize in Physics, is this: What humans do to, and ostensibly for, the earth does not matter in the long run, and the long run is what matters to the earth. We must, Laughlin says, think about the earth’s past in terms of geologic time.
For example: The world’s total precipitation in a year is about one meter—“the height of a golden retriever.” About 200 meters—the height of the Hoover Dam—have fallen on earth since the Industrial Revolution. Since the Ice Age ended, enough rain has fallen to fill all the oceans four times; since the dinosaurs died, rainfall has been sufficient to fill the oceans 20,000 times. Yet the amount of water on earth probably hasn’t changed significantly over geologic time. More...
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