Getting back to their sacred “97%” mantra, it appears a group of over 31,000 US scientists disagree with the premise and believe climate science is still unsettled and have signed a petition stating so.
"There is no convincing scientific evidence that human release of carbon dioxide, methane, or other greenhouse gases is causing or will in the foreseeable future cause catastrophic heating of the Earth's atmosphere and disruption of the Earth's climate," the petition says.Unlike some of the 'scientists' involved with the IPCC reports, many of whom were in Political Science, something that cannot be equated with actual science fields and does not use the Scientific Method which must be fully understood by anyone in the sciences or related fields.
"The purpose of the Petition Project is to demonstrate that the claim of 'settled science' and an overwhelming 'consensus' in favor of the hypothesis of human-caused global warming and consequent climatological damage is wrong," the petition asserts. "No such consensus or settled science exists."
Over 9,000 of the petition's signatories have a Ph.D. in a scientific field.
The origins of the “97%” figure are many, including a non-scientific poll sent out to over 3,000 people involved in the climate debate. Of the respondents, only 79 were actual climate scientists and out of those 79, 77 responded that they believed global warming was caused by human activity, hence your 97%. (The poll questions were leading, meaning it was what is called a 'push poll' which elicits the responses the poll was designed to evoke. True opinion polls ask a wide range of questions and should be designed to reflect the actual opinions of respondents and not lead them towards any particular response.)
Others were derived from analyzing numerous papers on the subject, looking for certain key words, and using the analysis to justify the 97% claim. Some of the authors of those papers protested, stating their conclusions do not match what the analysis reports.
Regardless, the so-called consensus about global warming is meaningless as “consensus science” isn't science, as more than one great scientist has stated. (Albert Einstein is reported to have stated, “It doesn't matter if a thousand scientists agree with me. It only takes one to prove me wrong.”)
As anyone versed in science knows, the science is never “settled” as new discoveries and new experiments can disprove or modify what is presently known about any scientific principle, theory, or hypothesis. And so it is with climate science.