An anonymous reader writes "The climate of Middle Earth has recently been under the spotlight, with the current and future climate of Middle Earth simulated using the HadCM3L General Circulation Model. However, to the best of our knowledge, there has been little work investigating the historical carbon emissions of Middle Earth. Specifically, what impact has the demise of dragons had on carbon emissions? To shed some light on this question, we start by considering the carbon footprint of the antagonist, Smaug." Smaug is surprisingly environmentally friendly.