Every year, the Nature and Biodiversity Conversation Union awards a "Dinosaur of the Year" award to highlight the "most ridiculous statement or anachronistic decision in connection with Nature and the Environment."
It is estimated that the "15 largest cruise ships emit as much sulfur dioxide pollution annually as all 760 million cars in the world".
Sulfur dioxide also comes from volcanic eruptions and is converted to sulfuric acid. This then converts in the stratosphere to create sulfate aerosols. These reflect the radiation of the sun, but also absorb heat from Earth, which warms the stratosphere.
Dino of the Year article
More info on sulfur aerosols
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