I wonder if after Pim Fortuyns' assassination by an enviro whacko, Professor Lomborg got nervous? I wouldn't blame him if he did. 99.9% of enviro whackos may have denounced Fortuyn's killing and killer, but all it takes is that one guy in a thousand who thought it was a good idea...
I would suggest buying The Skeptical Environmentalist. It's not a bad read and it's got loads of good charts and data you can use when you argue with people.
I would suggest buying the Skeptical Environmentalist...I agree. And, since Bjorn Lomborg started out to disprove Julian Simon, I would suggest reading almost anything by Julian Simon. My favorite is "Hoodwinking the Nation."