Next, we describe the future projection of eco-friendly fuels supply as follows.
Since the Kyoto protocol has come into effect in 2005, the technology on CO2 emissions
mitigation has developed significantly. In particular, the biomass energy system, that is, the
energy system using biomass materials such as wood, organic waste, sewage and similar
material, is one of the promising energy systems to abate CO2 emissions. Although
gasification technologies have attracted attention from all over the world, as one of the
future technologies, their energy efficiencies are quite different, due to the energy
conversion methodologies. Under these circumstances, the energy production cost is likely
to still be high, even if related subsidies, environmental regulations and/or policies are put
in place to support them.