This is an important distinction:
“Cigarette makers exploited this to great effect by confusing two very different senses of controversy, much as we still have today with climate change: there was an honest controversy about what to do about cigarettes causing harm, and a dishonest controversy about whether such harms had been scientifically proven. The genius of the industry was to confuse these two senses of controversy, one political, one empirical.”
I admit that remained agnostic toward global warming science for many years until multiple lines of evidence came in and established that it’s happening and that humans are a major driver. But now we need to move on from debating the reality human impacts and get to work on debating what to do about it.