An op-ed published in The New York Times takes aim at the Heartland Institute’s campaign to bring its brand of climate denial into classrooms across the country.

The Heartland Institute, a fossil fuel-funded think tank known for promulgating climate science denial, is now seeking to influence the country’s educators. The think tank plans to mail its book “Why Scientists Disagree About Global Warming” to 200,000 K-12 and college science teachers across the country. A cover letter accompanying the mailing asks educators to “consider the possibility that the science in fact is not ‘settled’” and argues that the 97 percent consensus among climate scientists “is not only false, but its presence in the debate is an insult to science.”

In an April 27 op-ed published in The New York Times, paleoclimatologist Curt Stager pushed back against Heartland’s misinformation, writing that “multiple surveys of the scientific literature show that well over 90 percent of published climate scientists have concluded that recent global warming is both real and mostly the result of human activity.” Indeed, in the past decade, there have been numerous surveys by a number of different researchers that confirmed human-caused global warming, and the country’s leading scientific institutions confirm the reality and urge action to address it.

Stager -- who describes himself as having been “cautiously skeptical myself before reaching the consensus position” on climate change -- further noted that increased scientific understanding over the past several decades “made it clear that the recent warming is not simply a result of natural variability or cycles.”

Stager also points out the lack of scientific expertise behind Heartland’s book, noting that despite Heartland’s claim that the book’s authors are “highly regarded climate scientists,” none of them “have the publication record of an accomplished expert in the field, though they may be lauded by the conservative media.” Stager could have additionally pointed out that each of the book’s authors’ -- Craig Idso, S. Fred Singer, and Robert M. Carter -- have extensive fossil fuel ties.

From the April 27 op-ed:

PAUL SMITHS, N.Y. — The Heartland Institute, a conservative think tank known for attacking climate science, has been mailing a slim, glossy book to public school teachers throughout the United States. The institute says it plans to send out as many as 200,000 copies, until virtually every science educator in America has one.

The book, “Why Scientists Disagree About Global Warming,” presents the false premise that the evidence for human-driven climate change is deeply flawed. To understand where the Heartland Institute is coming from, consider a recent comment by its president, Joseph Bast, who called global warming “another fake crisis” for Democrats “to hype to scare voters and raise campaign dollars.”

[...]

The cover letter inside, however, made the book’s premise clear. “Claims of a ‘scientific consensus’ ” on climate change, it read, “rest on two college student papers, the writings of a wacky Australian blogger, and a non-peer-reviewed essay by a socialist historian.” In fact, multiple surveys of the scientific literature show that well over 90 percent of published climate scientists have concluded that recent global warming is both real and mostly the result of human activity.

For example, a study in 2010 found that 97 percent of the 200 most-published authors of climate-related papers held the consensus position, and a survey in 2013 of 4,014 abstracts of peer-reviewed climate papers found 97 percent agreement. The Heartland-distributed book disputes the methods used in these and similar surveys but provides no definitive counterarguments against the overall weight of evidence. The fact is that survey after survey, involving multiple approaches and authors, finds a strong consensus among scientists who are most knowledgeable about climate change.

This latest edition contains a foreword by Marita Noon, described by the book as a columnist for Breitbart and executive director of Energy Makes America Great.

Ms. Noon introduces the book’s three authors as “highly regarded climate scientists.” Not quite true. Despite their academic credentials, none have the publication record of an accomplished expert in the field, though they may be lauded by the conservative media.

Having been cautiously skeptical myself before reaching the consensus position, I remember that some legitimate uncertainty about the human contribution to global warming did exist within my specialty of paleoclimatology several decades ago. Since then, however, high-quality climate reconstructions from ice cores, tree rings, lake sediments and other geological sources, coupled with rigorous analyses of solar activity, volcanism and fossil fuel emissions, have made it clear that the recent warming is not simply a result of natural variability or cycles. Long after the newer, better data convinced me and the vast majority of other climate scientists of the powerful human role in global warming, climate-change deniers still cling to the outdated idea of natural causes.