Roles and Issues of Bioenergy in a Decarbonized Energy System

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  • エネルギーの脱炭素化に果たすバイオエネルギーの役割と課題
  • エネルギー ノ ダツタンソカ ニ ハタス バイオエネルギー ノ ヤクワリ ト カダイ

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<p>Describing an overview of the expected role of bioenergy for decarbonization of the energy system, the basic framework and discussion points of the LCA methodology for assessing greenhouse gas （GHG） reduction benefits are summarized. In each of the EU, the U.S. and Japan, a system to ensure the sustainability of liquid biofuels and biomass power generation and heat use has been established by developing standards that include thresholds for GHG reductions calculated by LCA. In these LCA calculations, biomass-derived CO2 has been assumed to be zero, based on the concept of carbon neutrality. However, the significance of bioenergy use as a climate change countermeasure is being questioned, especially with regard to forest biomass, because of the time required for it to be reabsorbed by natural ecosystems. Bioenergy can be thought as a pioneer in the formation of a framework for confirming sustainability, including the confirmation of GHG reduction benefits, ahead of other decarbonization options. In the light of this experience, it can be recommended to accumulate our knowledge on the use of LCA for policy formulation and implimentation.</p>

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