It’s increasingly obvious that the global economic system, and particularly the current brand of U.S. capitalism, are not really compatible with the actions needed to combat climate change.Naomi Klein makes this point clear in “This Changes Everything,” which is both a passionate and controversial polemic and a reasoned discussion of the issues and forces stalling, and indeed preventing, a comprehensive response to climate change.The problem is not the political and ideological divisions or scientific “debate,” which are hard enough to deal with — it’s mainly about money, according to Klein. The book’s subtitle is compelling: Capitalism vs. The Climate. Simply put: “Our economic system and our planetary system are now at war.”