| U 1 | Human Impact and the Earth's Environment: Looking to the 21st Century and 3rd Millennium |
| Lead Convenors: A. V. Nikolaev (Russia), R. G. Bilham (USA) |
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| U 2 | Migration of Chemical Elements in the Earth's System |
| Lead Convenors: P. Gasparini (Italy), N. E. Peters (USA) |
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| U 3 | The Hidden Earth as Revealed from Space |
| Lead Convenor: J.O. Dickey (USA) |
| Co-Convenors: P. Mouginis-Mark (USA), J. Dozier (USA), F.W. Taylor (UK), K.Lambeck |
| (Australia), S. Zerbini (Italy), J.L. Fellous (France), A. Nishida (Japan) |
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| U 4 | Dynamic Complexity |
| Lead Convenor: R.W. Peltier (Canada) |
| Co-Convenors: J. Rundle (USA), D. Rothman (USA) |
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| U 5 | Recreating the Solar System: Roles of Processes in Homogenizing and Differentiating Solar System Objects |
| Lead Convenors: G.L. Siscoe (USA), T.V. Johnson (USA) |
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| U 6 | Origin and Evolution of the Continental Lithosphere |
| Lead Convenor: K. Burke (USA) |
| Co-Convenors: R. Taylor (Australia), J. Dewey (UK) |
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| U 7 | Inverse Problems in Geodesy and Geophysics |
| Lead Convenors: F. Sanso (Italy), M. Sambridge (Australia) |
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| U 8 | Natural Disaster Reduction |
| Lead Convenor: B.A. Bolt (USA) |
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| U 9 | The 1995 Intergovernmental Panel on Climate Change (IPCC) Report |
| Lead Convenor: B.J. Hoskins (UK) |
| Co-Convenor: Sir J. Houghton (UK) |
