These well-mannered gentlemen have been snookered.
According to the approving Spectator story, "Mr. Lomborg's thesis is straightforward: Global warming is real and humanity needs to do something about it."
PC has provided countless links pointing to data that radically undermine the scientific portion of that thesis. In the past ten years it's been exposed as incoherent, evidentially weak, and often supported by outright fraud.
The policy portion is even worse. The idea that "we" should do anything about the climate - beyond leaving individuals free to adapt to any changes that occur - is the fatal flaw in Dr. Lomborg's argument. No matter what we discover about the physics of the Earth, the politics of the world — not to mention human nature — make it clear that capitalism is the best cure... if there were any problem to solve.
Lomborg may be more skeptical and slightly less statist than many of his fellow Greens, but he still accepts their basic views. He's still committed to Comtean altruism, Roussean environmentalism, and garden-variety collectivism. He still touts a highly dubious hypothesis to justify them. Running around Africa crying over the poor doesn't change any of that.
Bjorn Lomborg is more dangerous than Al Gore precisely because he appears (and is) more moderate. Obvious con men like Gore expose their own racket before long. It's those who are more apparently reasonable - but still opposed to individualism and freedom - who do most of the damage today. Smiley-faced fascism is still fascist. Nanny may intend to be kind, but it's still unwise to give her $100 Billion of taxpayer funds and the power of the State in order to 'do good'.