The Download: the hunt for underground hydrogen and more rogue OpenAI agents

This is today’s edition of The Download, our weekday newsletter that provides a daily dose of what’s going on in the world of technology.How much hydrogen awaits us underground?A flurry of exploration efforts is searching for underground stores of hydrogen gas, which could provide a valuable source of zero-carbon fuel.The hunt has spread all over the world and engaged dozens of startups, including the Bill Gates–backed Koloma, which has been poking around the US Midwest to reac