The Skeptical Environmentalist

E R R Y E LL IS M in d en P ic tu re s conflict—they deserve full scrutiny. With that in mind, the book The Skeptical Environmentalist (Cambridge University Press), by Bjørn Lomborg, a statistician and political scientist at the University of Aarhus in Denmark, should be a welcome audit. And yet it isn’t. As the book’s subtitle—Measuring the Real State of the World—indicates, Lomborg’s intention was to reanalyze environmental data so that the public might make policy decisions based on the truest understanding of what science has determined. His conclusion, which he writes surprised even him, was that contrary to the gloomy predictions of degradation he calls “the litany,” everything is getting better. Not that all is rosy, but the future for the environment is less dire than is supposed. Instead Lomborg accuses a pessimistic and dishonest cabal of environmental groups, institutions and the media of distorting scientists’ actual findings. (A copy of the book’s first chapter can be found at www.lomborg.org) The problem with Lomborg’s conclusion is that the scientists themselves disavow it. Many spoke to us at SCIENTIFIC AMERICAN about their frustration at what they described as Lomborg’s misrepresentation of their fields. His seemingly dispassionate outsider’s view, they told us, is often marred by an incomplete use of the data or a misunderstanding of the underlying science. Even where his statistical analyses are valid, his interpretations are frequently off the mark—literally not seeing the state of the forests for the number of the trees, for example. And it is hard not to be struck by Lomborg’s presumption that he has seen into the heart of the science more faithfully than have investigators who have devoted their lives to it; it is equally curious that he finds the same contrarian good news lurking in every diverse area of environmental science. We asked four leading experts to critique Lomborg’s treatments of their areas—global warming, energy, population and biodiversity—so readers could understand why the book provokes so much disagreement. Lomborg’s assessment that conditions on earth are generally improving for human welfare may hold some truth. The errors described here, however, show that in its purpose of describing the real state of the world, the book is a failure. MISLEADING MATH EARTH about the Science defends itself against The Skeptical Environmentalist