In the novel Infinity Welcomes Careful Drivers, it is revealed that a giant toupee was installed over the Earth to cover the hole in the ozone layer, (also refered to in the original version of the episode Marooned)
In the novel Better than Life it is revealed to have been voted for by humanity as the dumping place for all of interstellar civilization's garbage. This was also used to remove the large number of captured GELF prisoners of war from the GELF revolt, as they where trapped on the planet. Due to a methane buildup the planet quite literally farted out of the solar system and into deep space, where it entered a long dark ice age. When Dave Lister saved the ship and crew of the Red Dwarf by shooting a planet out of the crash path of the ship the whole star system was reshuffled. This lead to the troubled planet's gravity knocking Dave Lister and Arnold Rimmer onto the Earth inside of Starbug. Rimmer eventually lost his remote connection and reappeared on Red Dwarf but Lister was trapped on the planet alone with no food.
Due to the Earth being moved near the system's sun its ice age melted in a single night - which led to Lister being the only human ever to sleep through a melting ice age. After nearly being corroded to death by acid rain Lister finds himself in a landscape made up of green glass bottles - the remains of humanity's garbage. Lister finds himself in Mount Rushmore in the American state of South Dakota. Lister is continually "attacked" by the Earth in the forms of earthquakes, oil rain, and lighting, and the paranoid part of his mind begins to suspect that the planet is desperate to keep humans, the ones who so hurt it, off its surface. Lister is spared after he swears to try and make it all right again and, with the help of giant cockroaches, start rehabilitating the planet for the next thirty seven years. The GELFs have also evolved after all this time, into the Polymorph, a shape shifting predator who feeds on creatures emotions. After rescuing Lister, the Red Dwarf crew had to face one. Earth is not mentioned again in either Backwards or Last Human.