Lisa the Tree Hugger/References

Cultural references

 * Lisa's quest to save Springfield's oldest redwood tree by living in it is a reference to the real-life story of and a redwood tree called "".  lived in the tree for two years and succeeded in preventing it from being cut down by loggers. The details of Lisa's day-to-day existence in her tree (such as hauling supplies up to her tent by a rope) are very similar to 's.
 * The montage where Bart delivers the menus for You Thai Now is a reference to The Matrix:
 * Music from the movie's soundtrack plays during the scene.
 * When Bart is in the apartment building, he goes into "" when he first enters the hallway, then runs along the walls as he leaves the menus on the doorknobs (referencing two of the movie's distinctive special effects shots).
 * When the giant log destroys Kentucky Fried Panda, Homer exclaims "No! It was finger-ling-ling good!", which is a reference to and its slogan, "Finger-Lickin' Good", and to either or both of two famous giant pandas named Ling-Ling:
 * Ling-Ling of fame, who lived from 1969 to 1992. The pair were a gift from China to the USA in 1972.
 * , who resided at the in Tokyo and lived from 1985 to 2008.
 * Kentucky Fried Panda may also be a reference to the fast-food chain, which serves American-Chinese cuisine.

Trivia

 * After Marge sings a song about thrift, Bart exclaims that he doesn't have a cap; however, he is seen wearing his lucky red hat in some episodes, commercials, comics and games.
 * Jesse points out that whichever member of Dirt First stays in the redwood won't be able to come back down "Not even for a Phish concert". In "Weekend at Burnsie's" several members of Dirt First are seen at the Phish concert.

Goofs

 * Lenny Leonard has gray hair in the group of people.
 * When Lisa is sitting on the couch watching a TV program that mourns her rumored death, her tongue is pink instead of red.