Green ammonia is about to be made on a working farm for the first time anywhere, at a macadamia operation outside Nairobi producing one ton per day. The plant runs on solar power, splitting water for hydrogen and pulling nitrogen from the air — skipping the natural gas that fertilizer production has depended on for over a century. That matters because the average bag of fertilizer in sub-Saharan Africa travels 10,000 kilometers to reach a farm, leaving growers exposed to every global price shock. Built by U.S. startup Talus Renewables, the system is small enough for a single farm and designed for places where supply chains are long and fragile. If it works, it offers a glimpse of food systems that are both cleaner and more self-reliant.