Recent years have seen increasing efforts, all over the world, to reduce greenhouse gas (GHG) emissions towards the realization of a carbon neutral society. 123 countries and one region including Japan have already announced the goal of achieving net zero GHG emissions by 2050, and policies to reduce use of fossil fuels are being formulated around the world towards achieving this goal. For example, the European Commission recently announced its intention to ban the sale of new cars with gasoline and diesel-powered engines by 2035. At the same time, hydrogen is attracting worldwide attention as a clean energy source that can replace fossil fuels.
