Former and current "Dancing with the Stars" participants turn over some green tips. (Gerri Miller)

[[transcript]]

Melissa Joan Hart: Hey, I'm Melissa Joan Hart.

Mark Ballas: And I'm Mark Ballas.

Tony Dovolani: Hi, I'm Tony Dovolani from "Dancing With The Stars."

Gilles Marini: Hi, this is Gilles Marini.

Joanna Krupa: Hi, I'm Joanna Krupa and you're watching the Mother Nature Network.

Melissa Joan Hart: Hey, I'm Melissa Joan Hart.

Mark Ballas: And I'm Mark Ballas.

Melissa Joan Hart: And, uh, I would say don't let your car idle. It's very bad.

Mark Ballas: And, uh, when you're brushing your teeth, with the toothbrush in your mouth, turn the water off.

Tony Dovolani: Hi, I'm Tony Dovolani from "Dancing With The Stars." My green tip of the day is never burn plastic, because plastic dissolves into very poisonous gas. Keep that in mind.

Gilles Marini: Hi, I'm Gilles Marini from "Brothers and Sisters" and my green tip of the day is: buy a car that doesn't really use too much gas, and a hybrid would be great. I have personally a biodiesel from Mercedes and it's awesome.

Joanna Krupa: Hi, I'm Joanna Krupa and my green tip is go organic. Fruits, vegetables, meats — organic's the way to go.

[[/transcript]]