https://www.nasa.gov/image-detail/gpim-newton-hotfire-4/
On June 3, members of the Green Propellant Infusion Mission (GPIM) project completed the fourth hot-fire acceptance test on a 1 Newton thruster at Aeroject...
gpimnewtonhotfirenasa
https://www.weforum.org/stories/2019/07/nasa-uses-new-green-fuel-to-successfully-power-satellite-in-orbit/
NASA has been working on its eco-friendly fuel, Green Propellant Infusion Mission, or GPIM, for years. It has now passed a crucial test.
green fuelnasagpimpassedcrucial