Preface; Acknowledgements; Part I. Introduction: 1. Introduction; 2. Excerpts from 1994 and 1995 IPCC Reports; Part II. The Missing Carbon Sink: 3. Carbon dioxide emissions from fossil fuel consumption and cement manufacture, 1751-1991 and an estimate of their isotopic composition and latitudinal distribution; 5. Emissions of carbon from land-use change; 6. The CO2 fertilizing effect: relevance to the global carbon cycle; 7. Soils and the global carbon cycle; 8. Grasslands and the global carbon cycle: modeling the effects of climate change; 9. Constraints on the atmospheric carbon budget from spatial distributions of CO2; 10. Estimating air-sea exchanges of CO2 from pCO2 gradients: assessment of uncertainties; 11. Atmospheric oxygen measurements and the carbon cycle; a strategy for estimating the potential soil carbon storage due to CO2 fertilization; Part III. Paleo-CO2 Variations: 12. Isotope and carbon cycle inferences; 13. Shallow water carbonate deposition and its effect on the carbon cycle; Part IV. Modeling CO2 Changes: 14. Future fossil fuel carbon emissions without policy intervention: a review; 15. The future role of reforestation in reducing the buildup of atmospheric CO2; 16. Simple ocean carbon cycle models; 17. Very high-resolution estimates of global ocean circulation, suitable for carbon cycle modeling; 18. Effects of ocean circulation change on atmospheric CO2; 19. Box models of the terrestrial biosphere; 20. Impacts of climate and CO2 on the terrestrial carbon cycle; 21. Stabilization of CO2 concentration levels; Part V. Appendix 1. Organizing committee; Appendix 2. Working group members; Appendix 3. Reviewers.