The study[0] popularized the "97% consensus" that 97% of climate scientists agree that humans are the main contributing factor to the observed global warming.
As far as I can tell, that 97% number includes those scientists who think humans contribute more than zero.
So a more honest conclusion would have been: 97% of climate scientists agree that humans have a non-zero impact on the global warming.
But they warped this into: 97% agree we are the main contributing factor.
This particular study is wildly misleading and borders on scientific misconduct?
[0] https://iopscience.iop.org/article/10.1088/1748-9326/8/2/024024/pdf