We should probably just reduce consumption and emissions though.
We do of course know how to power large ships with nuclear fission. The US Navy has been doing so - for generations(!).
Only issue with that is the US military is a "money is no object" scenario. Price container shipping at the unit cost of hauling it on a naval nuclear reactor, and we'd be looking at degrowth anyway. It's proven, practical technology, but very very expensive.
(Other countries with nuclear deterrents run their sub fleets on fission, but even those with nuclear subs have found it too costly for their surface fleet).
Actually, seeing recent developments, I'm afraid the only remotely realistic chance left to limit global warming is for fusion to become widely available and dirt cheap pretty damn soon! Renewables, you say? Nah, those windmills are disgusting and made in China anyway, so we're better off burning good clean American coal and oil (https://www.theguardian.com/us-news/2025/feb/03/trump-war-on...).
Chlorofluorocarbons stay 50-150 years in the atmosphere, once they are there it takes a while for things to go back to normal.
Hydrochlorofluorocarbons are also now banned pretty much everywhere, replaced with hydrofluorocarbons and hydrofluoroolefins which both have an ozone depletion potential of 0 (zero).