 His advocates further note that many of the scientists and environmentalists who criticized the book are not themselves environmental policy experts or experienced in cost-benefit research.In numerous interviews, Lomborg ascribed his motivation for writing "The Skeptical Environmentalist" to his personal convictions, making clear that he was a pro-environmentalist and Greenpeace supporter.He has stated that he began his research as an attempt to counter what he saw as anti-ecological arguments by Julian Lincoln Simon in an article in "Wired", but changed his mind after starting to analyze data.