The global trend towards hydrogen as a key low-carbon energy vector is rapidly increasing worldwide, due to its high gravimetric energy density. Following this current, there were analysed different ways to produce it, overall, the ones powered by renewable energy sources (green H2), which represents a bridge between today and a zero-emission future. All the types of H2 could be transported with several strategies and in different forms, for example in trucks through liquid or compressed gas state. However, these last two methods need sophisticated structures and elevated costs. At the same time, existing natural gas (NG) transmission and distribution pipelines represent a vast infrastructure that could carry hydrogen blended natural gas (HBNG) over long distances more economically than pure hydrogen pipelines too.