Hear that Congress? Bjorn Lomborg, the self-proclaimed “skeptical environmentalist” who is perhaps the world’s most famous climate-change skeptic, will declare climate change "undoubtedly one of the chief concerns facing the world today" and a "challenge humanity must confront” in an upcoming book. Lomborg has never denied that manmade climate change exists; rather, he has typically argued that it does not present much of a threat to mankind and that our resources would be better spent on other problems. In the book, Smart Solutions to Climate Change: Comparing Costs and Benefits, Lomborg calls for a $100 billion annual investment to fight climate change. The book looks at eight ideas that could help, focusing mostly on investments in renewable energy and also geo-engineering solutions, like “cloud whitening.” He calls for a carbon tax to fund these investments.