* John P. Holdren, [http://belfercenter.ksg.harvard.edu/publication/18467/convincing_the_climatechange_skeptics.html "Convincing Climate Change Skeptics"], Op-ed, ''Boston Globe'', August 4, 2008.
* John P. Holdren, [http://belfercenter.ksg.harvard.edu/publication/18472/climatechange_skeptics_revisited.html?breadcrumb=%2Fexperts%2F140%2Fjohn_p_holdren "'Climate-Change Skeptics Revisited"], Belfer Center for Science and International Affairs, Kennedy School of Government, Harvard University, August 5, 2008.
* [[Harrison Schmitt]] and [[William Happer]], [http://online.wsj.com/article/SB10001424127887323528404578452483656067190.html?mod=WSJ_Opinion_LEADTop "In Defense of Carbon Dioxide"], Op-ed, ''Wall Street Journal'', May 8, 2013.
===Related SourceWatch articles===