Gulf Arab states like Saudi Arabia, the UAE, and Oman, previously reliant on fossil fuels, are now focusing on “green” hydrogen as a way to transition their economies and address the climate crisis. They are investing in this climate-friendly fuel to diversify their revenue streams from oil and gas. While green hydrogen, produced through renewable energy, holds potential for various industries, its commercial viability is still uncertain and requires significant scaling-up of renewable energy sources. Despite challenges, Gulf countries are investing to remain influential energy players as oil revenues decline. Major projects in Saudi Arabia, the UAE, and Oman highlight their ambitions to lead in this emerging market.