Denial connects to a strawman argument, which changes the sceptics’ position to make it indefensible. Quite often we end up in discussing whether CO2 is a greenhouse gas or not when we should be discussing whether it is significant or not.
Quantitative arguments are mostly ignored in this debate. How much? should be the first question followed by when, how and why. In a spoken language insignificant is often translated to does not exist. We say that there is no AGW when me mean that it is insignificant.
Radiation is a cause of a cancer but we have not outlawed walking outdoors. Sense of proportion works here, at least yet, but green thinking is very much based on lack of it.