As climate unravels before our eyes: lead authors and new revelations. Syee Weldeab: in a climate not much warmer than today, long-frozen methane on the sea floor released. Michelle Dvorak’s: Earth will cross 1.5 degrees of warming before 2030, and probably two degrees C in the 2050’s. Kevin Rennert: America underestimates climate damage and undervalues climate action. Three interviews!