Gund Affiliate, Paul Ehrlich, and 15 other leading scientists have launched a scientists consensus on “Maintaining Humanity's Life Support Systems in the 21st Century". The full text of the statement and a list of the signatories is on the website of the Millennium Alliance for Humanity and the Biosphere, where it is available for signing by other scientists and the general public.

Anthony D Barnosky (lead author), James H. Brown, Gretchen C. Daily, Rodolfo Dirzo, Anne H. Ehrlich, Paul Ehrlich, Jussi T. Eronen, Mikael Fortelius, Elizabeth A. Hadly, Estella B. Leopold, Harold A. Mooney, John Peterson Myers, Rosamond L. Naylor, Stephen Palumbi, Nils Christian Stenseth, and Marvalee H. Wake wrote the document in response to a request from California Governor Jerry Brown to translate academic findings on global change into terms that policy makers and the general public can understand and act on. The document outlines the main environmental issues – from climate change to pollution and population growth – that policy makers must address immediately to avoid an approaching a global tipping point. More than 520 scientists from 44 countries have signed on in support of the document including 2 Nobel Laureates, 33 members of the U.S. National Academy of Sciences, 42 members of the American Academy of Arts and Sciences, and several members of various European scientific academies.