“Zero”

The November 20 issue of the New Yorker has another scary environment essay by the brilliant Elizabeth Kolbert, “The Darkening Sea: What Carbon Emissions Are Doing to the Ocean.” A few pages in, she quotes climate scientist Ken Caldiera:

Caldeira siad that he had recently gone to Washington to brief some members of Congress. “I was asked, ‘What is the appropriate stabilization target for atmospheric CO2?’ he recalled. “And I said, ‘Well, I think it's inappropriate to think in terms of stabilization targets. I think we should think in terms of emissions targets.’ And they said, ‘O.K., what's the appropriate emissions target?’ And I said, ‘Zero.’

“If you’re talking about mugging little old ladies, you don’t say, “What’s our target for the rate of mugging little old ladies?’ You say, ‘Mugging little old ladies is bad, and we’re going to try to eliminate it.’ You recognize you might not be a hundred per cent successful, but your goal is to eliminate the mugging of little old ladies. And I think we need to eventually come around to looking at carbon-dioxide emissions the same way.”