
Okay, the big red double chimney-thingy on the Carnival ships is very tall and has black smoke pouring out of it. The billowing smoke can be seen for miles away at any of the excursions.

Hypothesis: A group of Carnival executives were sitting around the boardroom table, discussing how they could make their image greener. In a stroke of genius, some Carnival executive came up with the idea that instead of taking a step towards becoming greener, they would simply promote the idea that the big red double chimney-thingy is your friend. Master of spin, Smokey the Steam Pipe* was born.
Smokey the Steam Pipe quickly became the mascot for Carnival. He is on t-shirts, mugs, fridge magnets; a souvenir Smokey the Steam Pipe mug filled to the brim with rum punch can be purchased for a small fee; children's hats are made made in his image. People are crazy for Smokey the Steam Pipe. He is a diety. Yes, Smokey the Steam Pipe is the epitome of fun and destinations, therefore that billowing black smoke coming from the chimney's entrails cannot be bad, ya hear?

*Funship Freddy is the actual name, and embodies the concept of the "Fun Day at Sea."