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Today we have a story about the sometimes obvious but sometimes sneaky effects of the way that we humans rearrange the elemental stuff around us. Reporter Avir Mitra and science journalist Lydia Denworth bring us a story about how one man\u2019s relentless pursuit of a deep truth about the Earth led to an obsession that really changed the very air we breathe.\nThis episode was reported by Avir Mitra, and produced by Matt Kielty, Becca Bressler, Rachael Cusick, and Maria Paz Guti\xe9rrez.\nSpecial thanks to Cliff Davidson, Paul M. Sutter, Denton Ebel, and Sam Kean.\xa0\n\nSupport Radiolab by becoming a member of\xa0The Lab\xa0today.\xa0 \xa0\xa0\nRadiolab is on YouTube!\xa0Catch up with new episodes and hear classics from our archive. Plus, find other cool things we did in the past \u2014 like miniseries, music videos, short films and animations, behind-the-scenes features, Radiolab live shows, and more. Take a look, explore and subscribe!