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  • News Feature
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We are seven billion

A Correction to this article was published on 27 October 2011

This article has been updated

This autumn, the world's human population will pass seven billion. Researchers are trying to identify the geographic hotspots where people and climate change are on a collision course.

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Change history

  • 30 September 2011

    In the version of this News Feature originally published, CIESIN should have been included in the credits for the panels in Box 2; this has now been corrected in the HTML and PDF versions.


  1. Balk, D. et al. in Population Dynamics and Climate Change (eds Guzmán, J. M., Martine, G., McGranahan, G., Schensul, D. & Tacoli, C.) 80–103 (IIED/UNFPA, 2009).

    Google Scholar 

  2. McGranahan, G. et al. Environ. Urban. 19, 17–37 (2007).

    Article  Google Scholar 

  3. O'Neill, B. et al. Proc. Natl Acad. Sci. USA 107, 17521–17526 (2010).

    Article  CAS  Google Scholar 

  4. Dun, O. Viet Nam Case Study Report (EACH-FOR, 2009); available at

    Google Scholar 

  5. Balk, D. et al. in Population Dynamics and Climate Change (eds Guzmán, J. M., Martine, G., McGranahan, G., Schensul, D. & Tacoli, C.) 206–217 (IIED/UNFPA, 2009).

    Google Scholar 

  6. McDonald, R. I. et al. Proc. Natl Acad. Sci. USA 108, 6312–6317 (2011).

    Article  CAS  Google Scholar 

  7. UN Department of Economic and Social Affairs World Urbanization Prospects: The 2009 Revision (United Nations, 2010); available via

  8. Jones, N. Nature Clim. Change 1, 327–329 (2011).

    Article  Google Scholar 

  9. Jäger, J., Frühmann, J., Grünberger, S. & Va, A. (eds) Synthesis Report (EACH-FOR, 2009); available via

  10. Feng, S. et al. Proc. Natl Acad. Sci. USA 107, 14257–14262 (2010).

    Article  CAS  Google Scholar 

  11. Warner, K. et al. In Search of Shelter: Mapping the Effects of Climate Change on Human Migration and Displacement (CARE International/UN University, 2009); available via

    Google Scholar 

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Correspondence to Kerri Smith.

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Smith, K. We are seven billion. Nature Clim Change 1, 331–335 (2011).

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