Hydrogen is a naturally occurring element in a gaseous form,
which requires extraction from compounds that contain it. The
ability of hydrogen to produce and store electricity has been known
for almost 180 years and has since been recognized as a versatile
fuel that has uses across several industries, such as fertilizers,
petroleum refining, food, electronics, and medicine.
Hydrogen can be classified based on the method in which it is
extracted. However, some of these methods are less friendly to the
environment:
India's current hydrogen consumption is primarily
'grey' hydrogen.
Green hydrogen: Water is the primary
element used to produce 'green' hydrogen. Water is
subjected to the process of electrolysis (passing electricity
through water) to split it into its constituents - i.e., oxygen and
hydrogen gas. If the source of the electrolysis is also
'green', the process is considered a 'renewable'
way to generate hydrogen, since the resultant hydrogen is
