I actually don't "deny" that there could be anthropogenic climate change, but until the left wants to have an honest debate on the costs (economic, freedom), and also when the left stops "denying" that it fits conveniently into their ideological economic model, then there can be no honest conversation.
There are plenty of things to discuss within the broad camp of "accepts that climate change is real and a potential problem." For example, the severity, the cause of individual events, the best responses, the potential dangers in the future, etc.
So you really don't want to discuss it? It's either your reality or the highway, as your other respondent alluded to.