This is what happens when you survey people whose paycheck depends upon the correct answer. Goal seeking, pick any question and see if you can get 100%. (You might not even get it with 1+1)
https://www.nationalreview.com/2015/10/climate-change-no-its-not-97-percent-consensus-ian-tuttle/
The “97 percent” statistic first appeared prominently in a 2009 study by University of Illinois master’s student Kendall Zimmerman and her adviser, Peter Doran. Based on a two-question online survey, Zimmerman and Doran concluded that “the debate on the authenticity of global warming and the role played by human activity is largely nonexistent among those who understand the nuances and scientific bases of long-term climate processes” — even though only 5 percent of respondents, or about 160 scientists, were climate scientists. In fact, the “97 percent” statistic was drawn from an even smaller subset: the 79 respondents who were both self-reported climate scientists and had “published more than 50% of their recent peer-reviewed papers on the subject of climate change.” These 77 scientists agreed that global temperatures had generally risen since 1800, and that human activity is a “significant contributing factor.”
A year later, William R. Love Anderegg, a student at Stanford University, used Google Scholar to determine that “97–98% of the climate researchers most actively publishing in the field surveyed here support the tenets of ACC [anthropogenic climate change] outlined by the Intergovernmental Panel on Climate Change.” The sample size did not much improve on Zimmerman and Doran’s: Anderegg surveyed about 200 scientists.