Geologists around the world are calling it the "new gold rush". We ask why companies are rushing to capitalise on white or natural hydrogen, with our guest Minh Khoi Le. He is the head of hydrogen research at business intelligence company Rystad Energy. According to the firm, 40 companies were searching for this "white gold" across the globe at the end of 2023, including in the US, Canada, France, Albania, South Korea and Colombia. Back in 2020, only 10 companies were involved.