Although the extraction process, using low-temperature gas liquefaction, was not developed in time to be significant during World War I, production continued.
Nakuba inqubo yezinga eliphansi lokushisa kwegesi ngaleso sikhathi lalingakhuliswa ngokwanele ukufakazela okuphawulekayo phakathi neMpi Yezwe Lokuqala, ukukhiqizwa kwaqhubeka.