References

1Shukman, D. 2009. Four degrees of warming “likely.”  BBC News 28Sept http://news.bbc.co.uk/2/hi/8279654.stm

2definition of biosphere from http://www.merriam-webster.com.dictionary.biosphere

3Solomon, S. G-K Plattner, R. Knutti and P. Friedlingstein. 2009. Irreversible climate change due to carbon dioxide emissions. Proceedings of the National Academy of Sciences, USA. 106:1704-1709

4Hawken, P., A. Lovins, and H. Lovins. 1999. Natural Capitalism: Creating the Next Industrial Revolution. Little, Brown and Company, New York, NY, p. 4.

5Cairns, J., Jr. 2002. Monitoring the restoration of natural capital: water and land ecosystems.  Chapter 1, pp. 1-31 in Advances in Water Monitoring Research, T. Younos, ed.  Water Resources Publications, LLC, Highlands Ranch, Colorado.

6Rubin, J. 2009. Why Your World is About to Get a Whole Lot Smaller. Random House, NY, p. 17.

7Rockström J. and 28 additional authors. In press. Planetary boundaries:  exploring the safe operating space for humanity. Ecology and Society, p. 8, online at http://www.stockholmresilience.org/download/18.1fe8f33123572b59ab800012568/pb_longversion_170909.pdf .

8Lynas, M. 2008. Six Degrees. National Geographic, Washington, D.C.

If you have any comments or questions, please send a message to super1@pitt.edu