September 22, 2008 – "Climate Change: the Human Dimension"
President Anote Tong, President of Kiribati

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October 16, 2008 – "The City's End: Two Centuries of Fantasies, Fears, and Premonitions of New York's Destruction"
Max Page, Author, The City's End

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April 7, 2009 – "Southern New England's Future Thirst: An Approach to Sustainability"
Tom Baron, Former Director of Operations, Massachusetts Water Resources Authority Water System