Author Matt Simon Matt Simon is a senior writer at Grist, covering climate solutions. Prior to that, he spent over a decade at Wired magazine. He’s the author of three books, most recently A Poison Like No Other: How Microplastics Corrupted Our Planet and Our Bodies. Matt Simon's Latest Articles Seeing the Fungi for the Trees By Matt Simon ● News ● August 14, 2025 Mycorrhizal fungi help plants thrive, and sequester a lot of carbon. But a new atlas shows these climate warriors need urgent protection. How Penguin Poop Helps Antarctica Keep its Cool By Matt Simon ● News ● May 27, 2025 Ammonia wafting from penguin guano contributes to cloud formation.