Although hydrogen is the most abundant element in the universe, it rarely exists in pure form on Earth and must therefore be manufactured prior to use in industrial applications. This article provides a high-level overview of hydrogen production processes and cross-references them with the colour coding system commonly encountered in sustainability discourse.

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Introduction

Hydrogen is the most abundant element in the universe, yet it rarely exists in pure form on Earth. Being highly reactive, it combines with other elements to form compounds such as water and methane. Therefore, in order to utilise Hydrogen for applications such as ammonia production or as an alternative fuel source, it must first be manufactured.