Greenhouse gas emissions from ships and boats in the U.S. 1990-2021
transportation sector CO₂ emissions in 2021.
Greenhouse gas emissions from ships and boats in the United States stood at 50.2 million metric tons of carbon dioxide equivalent (MtCO₂e) in 2021. This was an increase of nearly 55 percent in comparison to the previous year. Globally, shipping was responsible for 11 percent of the