
121Future Socio-Economics, Energy, Land Use, and Radiative Forcing
than the scenarios where the terrestrial carbon stock is valued. And, in such
less-than-ideal scenarios, bioenergy accounts for a major share of the global
energy system, replacing fossil fuel uses, particularly in the case where the
demand for emissions mitigation is large (e.g., POP14/MDG− and POP9/
MDG−). By contrast, in the scenarios families with the universal coverage of
carbon emissions (i.e., scenarios with MDG+), renewable energy or nuclear
power plays a more important role than bioenergy in lowering the carbon
intensity of the energy system and fullling the mitigation ...