Pioneering Sustainability: The Global Surge in Green Propellants for Next-Generation Spacecraft

  Introduction Space propulsion is entering a decisive inflection point. For decades, access to orbit and maneuverability in space have been powered by highly toxic, legacy propellants optimized for reliability rather than sustainability. Today, that model is breaking down under the combined pressure of exponential launch rates, mega-constellations, and a global shift toward responsible space…