Hydrogen could be essential for the zero-carbon economy, especially for cleaning up concrete, steel, and chemicals. It’s also a promising fuel source for transportation and electricity that's attracted hundreds of billions of dollars in global investment. But there’s a problem. Every year, the world produces millions of tons of hydrogen through a dirty process that creates  lots of CO2 and carbon monoxide. For hydrogen to be a truly clean fuel, we have to find a cleaner way to make it. And today we’re bringing you the story of one person who's spent a decade trying to do just that.  It’s an episode of one of our favorite podcasts, Watt It Takes. The show tells the stories of founders who are building our climate-positive future — their upbringings, their risks, their failures, and their breakthroughs. Today’s episode is with Rob Hanson, co-founder and CEO of Monolith, a clean hydrogen and industrial materials manufacturer that was recently awarded a $1 billion conditional loan guarantee by the Department of Energy. Emily talks to Rob about his journey to founding Monolith, what the DOE loan means for the company, and the future of clean hydrogen.