Lord Kelvin, Out of Context?
Robert Zubrin (“The Human Factor,” September 21) may well be right to deny that global warming poses a risk of catastrophic problems. Part of his case for that denial, however, rests on statistical sleight-of-hand.
Zubrin says that, over the past 50 years, the result of unconstrained emission of carbon dioxide into the atmosphere has been an increase in the global mean temperature of only 0.2 percent. The temperature went from 287 K to 288 K. He is right — if you measure global temperatures on the Kelvin scale. But why does he choose a scale that starts