Q. Dear Umbra, What is the full list of climate tipping points for melting ice, permafrost, etc.? And what´s the best guess of when each becomes irreversible? — Not Ever Ready for Vast Ocean, Understanding Science A. Dear NERVOUS, Woooo, OK. I´m not going to deny that this is an important question, especially given that it conveys a sense of much-needed urgency around climate change. But I´m going to be very candid: It took me a lot of anxiety-fighting self-care steps to start writing this column. I lay on the floor for a while, checked statements for every financial account I have, stared out the window, watched the Audubon Puffin Cam for too long, and drank about four liters of...
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