Hydrogen is the cleanest form of known fuel. Hydrogen could be grey, blue or green, depending on the production method. Grey hydrogen is the most common form and is generated from natural gas or methane through a process called ‘steam reforming.’

Blue hydrogen is that hydrogen, the carbon of which is captured and stored. It is carbon neutral hydrogen.

Green hydrogen or clean hydrogen is sourced from renewable energy sources, such as solar or wind power, electrolysing water into hydrogen and oxygen atoms.

Blue hydrogen costs $1.2 to $1.5 per KG. Green hydrogen costs $3 to $6.55 per kg. Fossil-based hydrogen costs about $1.8.

As costs would come down over a period of time, those could reach $1 per kg by the end of this decade.