The story
Coined by Greenpeace co-founder Robert Hunter in his 2003 book, Thermageddon: Countdown to 2030, from thermal + -geddon (after Armageddon (“the end of the world”)).
Etymology from Wiktionary, CC BY-SA 4.0.
Thermageddon
Today it means: A proposed apocalypse caused by the rising temperatures of climate change. Full definition →