- Mother Earth: I remember the first Earth Day, it was a Sunday just like this one. Everyone was so excited. Then... Monday. People forget.
- Nathan Thurm: I'm not defensive. You're the one who should be defensive, you're the one who thinks that hairdo works with that overly long face of yours.
- Elong Spengler: What does my haircut have to do with anything?
- Nathan Thurm: I don't know, you're the one who brought it up.
- Elong Spengler: No I didn't.
- Nathan Thurm: Yes you did.
- Hospital director: [Doc Brown shows images of polution on a computer screen] You want me to believe this is the future?
- Dr. Emmet' Brown: No, this is the present. I've been to the future. It's not that good.
- Vic's Buddy # 1: What the hell is Earth day anyway?
- Vic's Buddy # 2: Oh, it's that, eh, gopher thing, itn't it?
- Vic's Buddy # 1: No, no, what, are you kidding me? You're thinking of Groundhog day. Gopher was the bartender on Love Boat.
- Vic's Buddy # 2: No, no, no, Gopher was the steward on Love Boat, Ted was the Bartender.
- Kelly Bundy: Miss Rhoades, how long can the Earth survive if we don't start doing this?
- [recycling]
- Marcy D'Arcy: Who knows? Maybe as little as a hundred years.
- Al Bundy: So what's the rush? A hundred years? We'll all be dead by then! A hundred years. I thought this was an emergency.