Unable to address Texas senator Ted Cruz’s questions about “the Pause” — the apparent global-warming standstill, now almost 19 years long — at Tuesday’s meeting of the Senate Judiciary Subcommittee on Oversight, Sierra Club president Aaron Mair, after an uncomfortable pause of his own, appealed to authority: “Ninety-seven percent of scientists concur and agree that there is global warming and anthropogenic impact,” he stated multiple times.
The relevant exchange begins at 1:39 (though the whole segment is worth watching):The myth of an almost-unanimous climate-change consensus is pervasive. Last May, the White House tweeted: “Ninety-seven percent of scientists agree: #climate change is real, man-made and dangerous.” A few days later, Secretary of State John Kerry announced, “Ninety-seven percent of the world’s scientists tell us this is urgent.”
“Ninety-seven percent of the world’s scientists” say no such thing.
There are multiple relevant questions: (1) Has the earth generally warmed since 1800? (An overwhelming majority of scientists assent to this.) (2) Has that warming been caused primarily by human activity? And, if (1) and (2), is anthropogenic global warming a problem so significant that we ought to take action?