Governments, executives, researchers, and other parties around the world are looking to accelerate the ongoing energy transition to reach carbon neutrality. Aligning economies with the targets laid out in the Paris Agreement—limiting global warming to well below 2 °C, while pursuing efforts to limit the increase to 1.5 °Ci—means replacing legacy systems powered by fossil fuels with low-carbon energy sources such as renewables. Green hydrogen could overcome these limits and become the key clean hydrogen supply option in the long run, being both economically viable and truly sustainable.