The issue focused on climate change with climate scientist Richard Lindzen providing an overview of global warming's physics and biological impacts. Two papers focused on sea level rise that generated controversy (both papers received substantial criticism). See related Heartland Science Interview with Lindzen at Heartland Institute website and forum thread at forums.earthblog.org: Lindzen Responds to Comments by Stephan Lewandowsky at Blogspot site and forum thread at forums.earthblog.org: Climate Scientists Respond to Questions About Climate Change From Skept