As companies across the globe look for ways to cut carbon emissions, the first ammonia-fueled tugboat set sail on New York’s Hudson River Sunday, Sept. 22. The 67-year-old boat used to be run on diesel fuel, but the startup company Amogy bought it and adapted it to run on cleanly-made, carbon-free ammonia fuel.
This marks a major milestone in the race to replace fossil fuels with renewable fuels. According to the United Nations, emissions from shipping have gotten worse over the last decade as vessels have grown bigger to accommodate more cargo every trip and require more fuel.

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“The maritime and heavy-duty power industries generate a significant portion of global carbon emissions,” Amogy Project Lead Abigail Jablansky said, “and the advantage of using ammonia as a fuel is it eliminates carbon from that cycle entirely.”
The U.S. said about 3% of the global emissions total can be attributed to shipping alone.