I do have concerns about AGW
What specific concerns?
Do you feel that AGW can, in any way, lead to global climate disruption and negatively affect our climate, ie. more severe, non-typical weather per region?
The concern stems from the elegant simplicity of the AGW theory. We know that GHGs trap heat, we know that CO2 is a powerful GHG, we know that trophosperic CO2 is up by 40%since the industrial revolution, and there is strong evidence of a decadal scale rise in temperature since the 1870s. Taken in a vacuum, that is awful compelling. But, of course, that vacuum is a myth. To my list of unknowns above, add water vapor, urban heat island, solar cycles, limits (and worse) with climate models, and the possible benefits of some warming.