As with many of the critics - I really need to see an accurate model that could explain the phenomena he's predicting. And why would the plains of Germany being eight degrees hotter turn them uninhabitable? Tunis is more than eight degrees hotter than Berlin for the vast majority of the year, it doesn't stop the population of the greater Tunis area topping two million. Is there a reason why increased evaporation from the soil won't be compensated at least partially by increased rainfall due to increased evaporation from the sea?
I may not normally agree with Bjørn Lomborg's views on climate, but the quote attributed to him in the NY Times recently is something I can agree on:
Climate change is a real and serious problem that calls for careful analysis and sound policy. The cacophony of screaming does not help.