I am pointing out that the academic who is the subject of this thread fully acknowledges the reality of HUMAN ACTIONS - primarily GHG emissions, causing climate change- primarily but not only, global warming.

He is a skeptic of those who propose solutions arguing that they under estimate the difficulty of implementing changes to a population who are not evolved to consider the long term consequences of their actions- he does not deny the problem but rather points to the natural selfishness of humans who will be very reluctant to sacrifice their standard of living/consumption levels in favour of future generations who will pay for the majority of the 'externalities' (consequences) of the current populations GHG emissions.

Yes free markets cannot fix climate change because the externalities are not accounted for in the way free markets operate. This is why Libertarians hate climate change- because it logically requires a collective action response rather than a market response.

If we give any credence to Vaclav Smils prognosis, and I do largely agree with him- the biggest problem here is the reluctance of selfish individuals and communities and their natural desire to avoid and evade action now to protect and preserve a viable or reasonable future climate for future generations- so- the Libertarians who frequently mouth the rhetoric of climate change denial, seeking to sow doubt and FUD about there being any need to take action are very much a large part of the problem.

They (you included) are preaching a dishonest self serving rhetoric that obstructs any meaningful action being taken in response to the very real threat and reality of climate change. They are irrational selfish, mouthing dangerous lies that resist the collective action required for an effective response to climate change.