sentences:  Professor Bragi Árnason first proposed the idea of using hydrogen as a fuel source in Iceland during the 1970s when the oil crisis occurred.The idea was considered untenable, but in 1999 Icelandic New Energy was established to govern the transition of Iceland to the first hydrogen society by 2050.In the early 2000s, the viability of hydrogen as a fuel source was considered, and whether Iceland's small population, small scale of the country's infrastructure, and access to natural energy would ease a transition from oil to hydrogen.