*Patron, [[Optimum Population Trust]]
*External Advisory Board, [[Earth Institute]] <ref>[http://www.earth.columbia.edu/articles/view/1006 Advisory Board], Earth Institute, accessed August 5, 2009.</ref>
*Working Group, [[People and the Planet]] <ref>[http://royalsociety.org/People-and-the-Planet-Working-Group/ People and the Planet], Royal Society, accessed January 13, 2011.</ref>
==Resources and articles==