On Craftworld Ecoleg-Yfory, Earth Day is a nationalist military holiday that signals the beginning of the War Season with a day-long ceremony where every warrior of each warhost plants a tree in the massive Field of Khaine, one for each season they've gone to war. On death, each tree is uprooted, and re-planted on any of the craftworld's conquered and re-natured forest-planets, as designated in that Asuryani's will
Craftworld Ecoleg is half me venting preteen nostalgia for the late 2000s and its tech and aesthetics (IE "frutiger aero") and half an expression of my fascination w The era of American history (my childhood) where belief in climate change was widespread & believed to be something we can all work together to fix if we plant trees and recycle and eat plants and time showers. And putting all that into some space elves to make the funniest possible recipe for Wood Elves In Space