Jet skis are bad for the environment in several ways. They emit the most annoying kind of noise pollution. They waste gasoline in massive amounts by moving at just one to five miles per gallon. They make the air dirty with smog and emit carbon dioxide to accelerate global warming. Finally, they wreck the landscape, breaking off coral reefs, ruining wetlands, and sending wildlife running for cover.
Take this tote bag around to show that you're in favor of a ban on jet skis. The bag is made in the USA - no sweatshop outsourced labor involved!