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Published on Oct 6, 2012
A prominent climate-change denier now admits he was wrong. Astrophysics Professor Richard A. Muller says his doubts about previous climate change studies vanished after reviewing intensive research involving a dozen scientists. Muller now says global warming is real, and he goes a step further, saying humans are almost entirely the cause.
Muller: "Three years ago I identified problems in previous climate studies that, in my mind, threw doubt on the very existence of global warming," UC Berkeley astrophysics Professor Richard A. Muller wrote in an opinion piece in The New York Times.
Muller: "Last year, following an intensive research effort involving a dozen scientists, I concluded that global warming was real and that the prior estimates of the rate of warming were correct. I'm now going a step further: Humans are almost entirely the cause," he wrote.
"The average temperature of the Earth's land has risen by 2 1/2 degrees Fahrenheit over the past 250 years, including an increase of 1 1/2 degrees over the most recent 50 years," wrote Muller, who founded the Berkeley Earth Surface Temperature project to debunk unsupported global-warming claims.