A scientist can enter the fray by becoming an advocate for certain policies, like limits on carbon emissions or subsidies for wind power. That’s a perfectly legitimate role for scientists, as long as they acknowledge that they’re promoting their own agendas.

Image Credit... Viktor Koen

But too often, Dr. Pielke says, they pose as impartial experts pointing politicians to the only option that makes scientific sense. To bolster their case, they’re prone to exaggerate their expertise (like enumerating the catastrophes that would occur if their policies aren’t adopted), while denigrating their political opponents as “unqualified” or “unscientific.”

“Some scientists want to influence policy in a certain direction and still be able to claim to be above politics,” Dr. Pielke says. “So they engage in what I call ‘stealth issue advocacy’ by smuggling political arguments into putative scientific ones.”

In Dr. Pielke’s book, one example of this stealthy advocate is the nominee for White House science adviser, Dr. Holdren, a longtime proponent of policies to slow population growth and control energy use. (See TierneyLab, for more on his background.) He appears in a chapter analyzing the reaction of scientists to “The Skeptical Environmentalist,” a 2001 book arguing that many ecological dangers had been exaggerated.

Dr. Holdren called it his “scientific duty” to expose the “complete incompetence” of the book’s author, Bjorn Lomborg, a Danish political scientist. Dr. Holdren was one of the authors of an extraordinary 11-page attack on the book that ran in Scientific American under the headline, “Science defends itself against ‘The Skeptical Environmentalist’ ”  as if “science” spoke with one voice.

After reviewing the criticisms, Dr. Pielke concludes that a more accurate headline would have been, “Our political perspective defends itself against the political agenda of ‘The Skeptical Environmentalist.’ ”

“Public debates over climate change,” Dr. Pielke says, “often are about seemingly technical questions when they are really about who should have authority in the political debate. The debate over the science thus politicizes the science and distracts from policy.”