This volume presents the work carried out by eight working groups at a meeting held in Bad Harzburg, Germany, in March 1993, to develop a state-of-the-science assessment of the present and likely future carbon fluxes associated with the major components of the Earth's terrestrial biosphere. Major topics considered were: Global Carbon Cycle; Boreal Forests and Tundra; Temperate Forests; Tropical Forests; Grasslands, Savannas and Deserts; Land and Water Interface Zones; Agroecosystems; and Biomass Management.