Futurama S01 E08 A Big Piece of Garbage

"Defying gravity and common sense."

A big piece of garbage that was released a thousand years ago is now on the way to Earth to destroy it. After Fry, Leela and Bender fail on placing a bomb on it, the city has to build another big piece of garbage, yet that may be a problem since trash doesn't exist in year 3000.