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Green Ammonia: How Clean Ammonia Is Reshaping Fertilizer Production
Sustainability · Clean Ammonia
Green Ammonia: How Clean Ammonia Is Reshaping Fertilizer Production
Almost every nitrogen fertilizer in the world starts as ammonia, and almost all of that ammonia is made from natural gas. That single chemical step is one of the largest industrial sources of carbon dioxide on the planet. Green and blue ammonia change the input rather than the molecule, and in doing so, they are beginning to change the economics of fertilizer for exporters in Egypt, North Africa and the Gulf.
Key takeaways
- Ammonia is the feedstock for urea, ammonium nitrate, ammonium sulphate and most other nitrogen fertilizers.
- The colour labels, grey, blue, green, describe the hydrogen source and emissions, not the product itself.
- Green ammonia is chemically identical to conventional ammonia; no equipment change is needed downstream.
- Carbon border pricing in the EU makes the embedded emissions of fertilizer a commercial issue for exporters, not just an environmental one.
Where green ammonia comes from
The Haber-Bosch process combines nitrogen from the air with hydrogen under high temperature and pressure to make ammonia. Nitrogen is free and abundant. Hydrogen is neither, and how it is produced determines the entire carbon footprint of the resulting fertilizer.
In conventional production, hydrogen comes from steam methane reforming of natural gas, which releases carbon dioxide both as a direct process by-product and from the energy used to drive the reaction. Ammonia manufacturing is consequently responsible for a meaningful share of global industrial CO₂ emissions, commonly estimated at around one to two percent of the global total, alongside a significant share of industrial energy use.
GreyConventional
Hydrogen from steam methane reforming of natural gas. Carbon dioxide is released to the atmosphere. Currently the dominant production route worldwide and the lowest-cost option in gas-rich regions.
BlueAbated
Same route, but a large share of the CO₂ is captured and stored or used. Emissions fall substantially without replacing existing plants, a practical transition step for established producers.
GreenRenewable
Hydrogen from water electrolysis powered by renewable electricity. Near-zero process emissions. Currently more expensive, and dependent on renewable capacity and electrolyser cost.
Why this matters commercially, not only environmentally
For most of the industry’s history, the carbon intensity of ammonia was an environmental statistic with no effect on price. That has changed for anyone exporting into carbon-priced markets.
The European Union’s Carbon Border Adjustment Mechanism applies to fertilizer imports, requiring importers to account for the embedded emissions of the goods they bring in. For producers in Egypt, North Africa and the Gulf, regions that supply significant fertilizer volumes to European buyers, that turns the carbon intensity of a plant into a line item in the landed cost. Low-carbon production becomes a competitiveness question.
Regional advantages are real here. High solar irradiance, available land, and existing ammonia infrastructure and export ports give North Africa and the Gulf a genuinely strong position for renewable hydrogen and green ammonia production, and several large projects across the region are being developed on exactly that logic.
What changes for the farmer, and what does not
The critical practical point is that green ammonia is chemically identical to conventional ammonia. Urea produced from green ammonia is the same urea, with the same 46% nitrogen analysis, the same behaviour in soil, the same volatilisation risk and the same handling requirements. No new equipment, no new application technique, no change to the agronomy.
| Aspect | Effect of switching to green ammonia |
|---|---|
| Nutrient content and analysis | Unchanged |
| Agronomic performance | Unchanged |
| Application equipment | Unchanged |
| Product carbon footprint | Substantially lower |
| Current cost | Higher, narrowing as renewable and electrolyser costs fall |
| Market access to carbon-priced regions | Improved |
| Buyer and retailer sustainability requirements | Easier to satisfy and document |
What does change is the story attached to the harvest. Food processors, retailers and export buyers increasingly ask growers to document the emissions embedded in their production. Fertilizer is often the single largest contributor to a crop’s carbon footprint, so the ammonia route behind it becomes part of that documentation.
Ammonia beyond fertilizer
Ammonia is also attracting attention as an energy carrier. It contains hydrogen in a form that is far easier to liquefy, store and ship than hydrogen itself, and it burns without producing carbon dioxide. That has driven serious interest in ammonia as a marine fuel and as a medium for moving renewable energy between continents.
For fertilizer producers, this matters because it changes the demand picture. If ammonia becomes an energy commodity as well as an agricultural feedstock, production scale rises and the two markets begin competing for the same molecules, with consequences for price and availability that agricultural buyers will feel.
The realistic transition
Green ammonia will not displace conventional production quickly. Electrolysers remain capital-intensive, renewable electricity supply must be firm enough to run a continuous chemical process, and existing plants have decades of remaining life. The credible near-term path is a mix: efficiency improvements at existing plants, carbon capture retrofits producing blue ammonia, and new green capacity built where renewable resources are strongest.
Alongside the production route, nutrient use efficiency in the field remains one of the fastest levers available. Every kilogram of nitrogen that reaches the crop instead of leaching or volatilising reduces the footprint of the harvest, which is why the practices covered in our fertigation guide and NPK fundamentals sit alongside cleaner production rather than behind it.
You can read more about our own approach on the clean ammonia page and in protecting people and the environment.
Frequently asked questions
What is green ammonia?
Ammonia produced using hydrogen from water electrolysis powered by renewable electricity, rather than hydrogen derived from natural gas. The ammonia itself is chemically identical; only the emissions of making it differ.
Is green ammonia better for crops than conventional ammonia?
No, and that is the point. It is the same molecule with the same agronomic behaviour. The advantage is a lower production footprint, not improved field performance.
What is the difference between blue and green ammonia?
Blue ammonia uses the conventional natural-gas route with carbon capture applied to a large share of the CO₂. Green ammonia avoids fossil feedstock altogether by using renewable-powered electrolysis.
Why is green ammonia more expensive?
Electrolysers require significant capital investment and large volumes of renewable electricity. As electrolyser costs fall and renewable capacity grows, the gap narrows, and carbon pricing narrows it from the other direction.
How does carbon border pricing affect fertilizer exporters?
Importers into carbon-priced markets such as the EU must account for the emissions embedded in the fertilizer they bring in. That gives lower-carbon producers a cost advantage on those routes and makes production emissions a commercial variable.
Talk to us about clean ammonia and low-carbon nutrition
The Gate Group works with international partners on clean ammonia and sustainable crop nutrition across Africa, the Middle East and Europe.
Related reading: Industrial solutions · Our partners · Mission, vision and values
