Car Of A Futurama Fan

Environmentally, common animals still remain, alongside mutated, cross-bred (sometimes with humans) and extraterrestrial animals. Owls are often shown to have replaced rats as common household pests, although rats still exist, sometimes rats act like pigeons, but pigeons still exist. Pine trees and poodles have been extinct for 800 years. Earth still suffers the effects of greenhouse gases, although in one episode Leela states that its effects have been counteracted by nuclear winter. In another episode, the effects of global warming have been somewhat mitigated by the dropping of a giant ice cube into the ocean, and later by pushing Earth farther away from the sun. Futurama's setting is a backdrop, and the writers are not above committing continuity errors if they serve to further the gags. For example, while the pilot episode implies that the previous Planet Express crew was killed by a space wasp, the later episode "The Sting" is based on the crew having been killed by space bees instead. The "world of tomorrow" setting is used to highlight and lampoon issues of today and to parody the science fiction genre.
Although the series uses a wide range of styles of humor, including self-deprecation, black comedy, off-color humor, slapstick, and surreal humour, its primary source of comedy is its satirical depiction of everyday life in the future and its parodical comparisons to the present. Matt Groening notes that, from the show's conception, his goal was to make what was, on the surface, a goofy comedy that would have underlying "legitimate literary science fiction concepts." The series contrasted "low culture" and "high culture" comedy; for example, Bender's catchphrase is the insult "Bite my shiny metal ass" while his most terrifying nightmare is a vision of the number 2, a joke referencing the binary numeral system (Fry assures him, "there's no such thing as two.").