During the month of February, the Population Institute asked leading scientists, academicians and environmental leaders to "speak out" on population and environmental sustainability as part of the second annual "Global Population Speak Out" (GPSO). Nearly 400 people responded to the invitation. The participants, who spanned six continents and 39 nations, were asked to speak out publicly on population in the popular media. GPSO participants made their voices heard in dozens of radio talk shows and interviews, and in print publications ranging from the New York Times to the Huffington Post and the International Herald Tribune.