> How much co2 is produced from container ship?

> However, ships emit only between 10 to 40 grams of carbon dioxide per kilometer. The carbon footprint of airplanes is 20 to 30 times more than ships.

https://8billiontrees.com/carbon-offsets-credits/carbon-ecol....

https://www.europarl.europa.eu/news/en/headlines/society/201...

If you use 40g per km as commented here, it comes out to about 1 tree. Something seems off.