concentrations. The uncertainty range represents the influence of climate sensitivity to a CO2 doubling in the range of 1.5 °C to 4.5 °C (Kheshgi et al., 2005; Kheshgi 2004a). This table considers the possibility of increased carbon storage in the terrestrial biosphere. Such an increase, if permanent, would allow a corresponding increase in total cumulative emissions. This table does not consider natural or engineered dissolution of carbonate minerals, which would increase ocean storage of anthropogenic carbon. The amount already in the oceans exceeds 500 GtCO2 (= 440 GtCO2 for 1994 (Sabine et al., 2004) plus CO2 absorption since that time). The long-term amount of CO2 stored in the deep ocean is independent of whether the CO2 is initially released to the atmosphere or the deep ocean.

Atmospheric CO2 stabilization concentration (ppmv)

Total cumulative ocean + atmosphere CO2 release (GtCO2)

Amount of anthropogenic CO2 stored in the ocean in equilibrium (GtCO2)

Guide to Alternative Fuels

Guide to Alternative Fuels

Your Alternative Fuel Solution for Saving Money, Reducing Oil Dependency, and Helping the Planet. Ethanol is an alternative to gasoline. The use of ethanol has been demonstrated to reduce greenhouse emissions slightly as compared to gasoline. Through this ebook, you are going to learn what you will need to know why choosing an alternative fuel may benefit you and your future.

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