First paragraph (links omitted): A new study by a team of political scientists and sociologists at the journal Environmental Politics concludes that 9 out of 10 books published since 1972 that have disputed the seriousness of environmental problems and mainstream science can be linked to a conservative think tank (CTT). Following on earlier work by co-author Riley Dunlap and colleagues, the study examines the ability of conservative think tanks to use the media and other communication strategies to successfully challenge mainstream expert agreement on environmental problems.