Atmospheric levels of CO2 have risen significantly from preindustrial levels of 280 parts per million (ppm) to present levels of 384 ppm (Tans, 2008). Evidence suggests the observed rise in atmospheric CO2 levels is the result of expanded use of fossil fuels for energy. Predictions of increased global energy use during this century indicate a continued increase in carbon emissions (EIA, 2007) and rising concentrations of CO2 in the atmosphere unless major changes are made in the way energy is produced and used; in particular, how carbon is managed (Socolow et al., 2004; Greenblatt and Sarmiento, 2004). CO2 sinks are a natural part of the carbon-cycle; however, natural sinks are unable to absorb.
