Like, first there's Freiza's ship coming down and clearing literally all the clouds in the sky. Then you generally just have Goku and Vegeta's fights with Broly that wrecked some things up. Then Broly does his Planet Crusher Sphere that destroys all the ice and snow and turns the entire land into a volcanic desert, then there's Gogeta and Broly fighting that levels the field even more. And they did all in one day too I'm pretty sure.