Funny, but the book isn’t science so why should it have to abide by the scientific process? Lomborg wrote a piece of advocacy and did no original scientific research. It is a mystery to me why so many are taking him seriously. There are serious discussions to have about specific environmental challenges and the science behind them, but he doesn’t add to those discussions in any substantive way. He does give right wing hacks something to scream about, but they would do that anyway.
Peter Raven sums it up well:
"The environment is a field where, when people do some light calculations like Lomborg did, it’s easy to argue for a happy-times kind of conclusion," said Dr. Peter H. Raven, the director of the Missouri Botanical Garden and president of the American Association for the Advancement of Science.
But such findings should not be portrayed as science, he said, adding, "This is a just outcome that ought to bring his credibility to a halt except for those who desperately want to believe what he says."
He deserves little more attention than do creationists.