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11 Grigg, D.B. 1974. The Agricultural Systems of the World: an Evolutionary Approach. Cambridge: Cambridge University Press. 358.; Weisdorf, Jacob L. 2005. “From Foraging To Farming: Explaining The Neolithic Revolution.” Journal of Economic Surveys. 19(4): 561-586.

12 Gignoux, Christopher R., Henn, Brenna M., and Joanna L. Mountain. 2011. “Rapid, global demographic expansions after the origins of agriculture.” Proceedings of the National Academy of Sciences. 2011. 108(15): 6044-6049.

13 Cohen, Joel E. 1995. “Population growth and Earth's human carrying capacity.” Science. 269: 341-346.

14 Malthus, Thomas R. 1798. An Essay on the Principle of Population, as it Affects the Future Improvement of Society, with Remarks on the Speculations of Mr Godwin, M. Condorcet, and other writers. London: J. Johnson. 3-143.

15 Netting, Robert M. 1993. Smallholders, Householders: Farm Families and the Ecology of Intensive Sustainable Agriculture. Stanford, CA: Stanford University Press. 416.; Boserup, Ester. 1965. The Conditions of Agricultural Growth: The Economics of Agrarian Change under Population Pressure. London: Allen & Unwin. 124.; Tiffen, Mary, Mortimore, Michael, and Francis Gichuki. 1994. More People, less Erosion: Environmental Recovery in Kenya. edn. John Wiley & Sons Ltd.; Ellis, Erle C., and S.M. Wang. 1997. “Sustainable traditional agriculture in the Tai Lake Region of China. Agriculture, Ecosystems & Environment. 61(2-3): 177-193.

16 Weisdorf, Jacob L. 2005. “From Foraging To Farming: Explaining The Neolithic Revolution.” Journal of Economic Surveys. 19(4): 561-586.; Boserup, Ester. 1965. The Conditions of Agricultural Growth: The Economics of Agrarian Change under Population Pressure. London: Allen & Unwin. 124.

17 Grigg, D.B. 1974. The Agricultural Systems of the World: an Evolutionary Approach. Cambridge: Cambridge University Press. 358.; Netting, Robert M. 1993. Smallholders, Householders: Farm Families and the Ecology of Intensive Sustainable Agriculture. Stanford, CA: Stanford University Press. 416.

18 Raudsepp-Hearne, Clara, et al. 2010. “Untangling the Environmentalist's Paradox: Why Is Human Well-being Increasing as Ecosystem Services Degrade?” BioScience. 60: 576-589.; Dale, T. and V.G. Carter. 1955. Topsoil and Civilization. Norman, OK: University of Oklahoma Press. 270.

19 Boserup, Ester. 1965. The Conditions of Agricultural Growth: The Economics of Agrarian Change under Population Pressure. London: Allen & Unwin. 124.; Boserup, Ester. 1981. Population and Technological Change: A Study of Long Term Trends. Chicago: University of Chicago Press. 255.; Turner II, B.L., Hanham, Robert Q., and Anthony V. Portararo. 1977. “Population Pressure and Agricultural Intensity.” Annals of the Association of American Geographers. 67(3): 384-396.; Netting, Robert M. 1993. Smallholders, Householders: Farm Families and the Ecology of Intensive Sustainable Agriculture. Stanford, CA: Stanford University Press. 416.; Ruddiman, William F. and Erle C. Ellis. 2009. “Effect of Per-Capita Land use Changes on Holocene Forest Clearance and CO2 Emissions.” Quaternary Science Reviews. 28: 3011-3015.

20 Ellis, Erle C., and S.M. Wang. 1997. “Sustainable traditional agriculture in the Tai Lake Region of China. Agriculture, Ecosystems & Environment. 61(2-3): 177-193.

21 Grigg, D.B. 1974. The Agricultural Systems of the World: an Evolutionary Approach. Cambridge: Cambridge University Press. 358.; Netting, Robert M. 1993. Smallholders, Householders: Farm Families and the Ecology of Intensive Sustainable Agriculture. Stanford, CA: Stanford University Press. 416.

22 Steffen, Will, Crutzen, Paul J., and John R. McNeill. 2007. “The Anthropocene: Are Humans Now Overwhelming the Great Forces of Nature.” AMBIO: A Journal of the Human Environment. 36(8): 614-621.

23 Ibid.

24 Alloway, B.J. and D.C. Ayres. 1997. Chemical Principles of Environmental Pollution. 2nd ed. Water, Air, & Soil Pollution. New York: Chapman & Hall. 102: 416.

25 Matson, P.A., et al. 1997. “Agricultural intensification and