People often say: “97 percent of scientists agree on climate change.”

It’s commonly used to shut down debate about the impacts of climate change and the proposed solutions. - Lucy Biggers
But that 97% comes from a single paper led by John Cook, and the paper has been thoroughly discredited.

• It didn’t survey scientists or ask experts what they believe. 

Instead, activist researchers read paper abstracts and decided whether they were part of the consensus.
To count as agreement, a paper only had to say humans influence the climate at all, not by how much, and not whether it’s dangerous.
So if a paper simply stated, “CO₂ is a greenhouse gas,” it was included in the 97%—along with scientists whose findings suggest warming will be modest and manageable.