Unfortunately, Lomborg relies mostly on the credentials of his sources to make his case that preventing global climate change now will save the world untold trillions of dollars later. I need a much more data driven story to be convinced. Lomborg doesn't offer much in the way of numbers.

This is a policy recommendation made on economic predictions for 90 years in the future. It would take a lot of convincing with strong evidence for me to trust such numbers, when economists can barely reach consensus something as simple (relatively) as when a recession started.

Lomborg presents the economist's view of how to combat global warming, maximizing benefit vs cost while blithely assuming that the speculative climate engineering and research into nonemitting forms of energy will pan out. Truly an optimist's view with no plan B. Nevertheless, along the way he makes some valuable moral observations.