When Beast Boy is selling vacuums, the house he approaches looks just like the Brady family's house from "The Brady Bunch". That house was also seen as Killer Moth's home in "Date with Destiny".
Beast Boy wearing a helmet and scarf riding his moped is a reference to the character of Haruko from the anime series "FLCL" who rides his moped wearing a helmet and scarf.
This episode is partially inspired by the movie, "Soylent Green" where the secret ingredient of food source in the future... is people! Also, The Source's line, "The secret is .... water!" is similar to Charlton Heston's revelation in "Soylent Green."