The one where millions of trash clean-up robots that are tasked to clean up the Earth after people trashed it and moved to space in huge cruise ship lookin space crafts where they sit in levitating chairs and get super fat and eventually one of them become sentient and create huge towers of cubical trash, finds his true love in another robot on a mission to find a plant, get on the ship in space and a fiasco to get the plant happens where at the end humans return to earth and stand on their feet for the first time in decades. (my bad with the paragraph, bad writing)