Dr. Pete Lunn:

What concerns me about collective action problems requiring disparate action is that many behavioural findings we know about suggest it is likely that I will overestimate my contribution and underestimate that of others if the latter is different from mine. Not only do we not know that for sure in the climate space, not having really researched it, but we do not know the scale of the effect. Also, we do not know interventions that could potentially counter it. We do not know what behaviours it will be strong with and what kind it will be weak with. We do not know whether it will split on an urban–rural basis or how much identity might play into it.