https://phys.org/news/2021-02-plasma-technology-world.html https://portal.nifa.usda.gov/web/crisprojectpages/1025777-lo... https://pubs.acs.org/doi/10.1021/acssuschemeng.2c06357 (paywalled)
"plasma" and "NOx" seem to be the keywords here (so other process than discussed here).
Not at scale (yet), cost unclear. But the technology exists, and being improved upon.
