1 In the BBC's Dimbleby Memorial Lecture presented at the Institute of Education, London, 14 December 2001, available at
2 International Water Management Institute estimates; UNEP, Global Environment Outlook 3, United Nations Environment Programme/Earthscan, London, 2002.
3 Science, 19 November 1999.
4 DH Meadows, DL Meadows, J Randers and WW Behrens, The Limits to Growth: A Report for the Club of Rome's Project on the Predicament of Mankind, Universe Books, New York, 1972.
5 H Kahn, W Brown and L Martel, The Next 200 Years: A Scenario for America and the World, William Morrow, New York, 1976.
6 EF Schumacher, Small is Beautiful: Economics as if People Mattered, ...

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