The 7th International CO2 Conference Web Site - Information Needs for Adaptive Management of the Carbon Cycle: From Regional Car

by Dennis Ojima

During the past two centuries, human activities have undertaken a vast earth system modification of the carbon (C) cycle. Early during this period, humans have converted native vegetation to croplands. Such land use changes have mobilized massive amounts of C. During the past century, increased use of fossil energy sources, primarily coal and oil, have resulted in the rapid expansion of industry and technology throughout the world. The resulting impact has been to greatly increase the atmospheric concentration of C dioxide (CO₂) to where in 2004 it is estimated to 375ppm, nearly 100 pm greater than the pre-industrial levels. Fossil fuel emissions and land use change have moved the global C cycle out of balance.

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