Thanks to generous subsidies, the world is about to start making a lot more low- and zero-carbon H2. These charts show how. To be clear, the world does make a fair amount of H2 today. It’s just overwhelmingly dirty H2, made using fossil fuels. Nearly all of the 95,000 kt of H2 produced each year comes from an emissions-intensive process called steam methane reforming, which uses fossil gas as its ...