I call BS on this. An almost 30% rise in CO2 emissions in only 20 years just from fishing vessels? I think these vegan climate hysterics are as trustworthy as the ones with their gun control statistics. Totally made up quackery.
I think you are reading it wrong.
It isn’t claiming that all CO2 went up by 28% due to fishing vessels.
It claims that the amount of CO2 from fishing vessels increase by 28% over that time. A much more reasonable claim. Basically if fishing increase by 28% over those 20 years, this would be completely expected.