Further reading
https://ammoniaindustry.com/renewable-ammonia-demonstration-plant-announced-in-south-australia///ammoniaindustry.com/green-ammonia-pilot-plants-now-running-in-oxford-and-fukushima/
://www.carboncommentary.com/blog/2017/7/5/hydrogen-made-by-the-electrolysis-of-water-is-now-cost-competitive-and-gives-us-another-building-block-for-the-low-carbon-economy
Almost all hydrogen is made today from what is known as ‘steam reforming’, usually of methane (the main constituent of natural gas). A stream of gas is mixed with high temperature steam in the presence of a catalyst. The eventual output of the process is a mixture of CO2 and hydrogen. The valuable hydrogen is collected and the CO2 vented to the atmosphere. If my calculations are correct, the hydrogen produced today through the steam reforming process is resulting in approximately 500 million tonnes of emissions a year, or well over 1% of global GHGs. [1]