Red meat has a huge carbon footprint because cattle requires a large amount of land and water.
https://sph.tulane.edu/climate-and-food-environmental-impact-beef-consumption
Demand for steaks and burgers is the primary driver of Deforestation:
https://e360.yale.edu/features/marcel-gomes-interview
If you don’t have a car and rarely eat red meat, you are doing GREAT 🙌🙌 🙌
Sure, you can drink tap water instead of plastic water. You can switch to Tea. You can travel by train. You can use Linux instead of Windows AI’s crap. Those are great ideas. But, don’t drive yourself crazy. If you are only an ordinary citizen, remember that perfect is the enemy of good.
Is burning bunker fuel in international waters very polluting and should someone try to do something about it? Yes it is and yes they should. And the good news is that they have been working at it: https://www.imo.org/en/mediacentre/hottopics/pages/sulphur-2020.aspx
But were the more polluting cargo ships from the past more polluting than “a continent”? Probably only if that continent was not Asia, Europe, America or Africa. If they were and I’m wrong, then I would love to see a source. Telling me to “google it” is not a source, I already tried looking for it when I first asked the question and I could find no info about this claim. It seemed like a hyperbole comparison that they made up.
I also tried looking up your claim that 10 ships pollute more than all cars combined, and the first result was an article debunking a similar myth (about 15 ships): https://www.oldsaltblog.com/2021/04/no-sixteen-large-ships-do-no-pollute-more-than-all-the-cars-in-the-world/