According to this report, operators of cargo ships must reevaluate their ships' emissions:
I have a better idea:
1. Since we're allegedly going to stop using carbon fuels, the world will not need oil tankers or LPG carriers.
2. If we all do our own manufacturing (e.g., with 3-D printers), the world will not need cargo ships.
3. And if we stop waging war on everyone, the world will not need warships.
Take a chill pill, Al Gore.