I didn't know these numbers, so I had to look them up: * Ships are responsible for 90% of international transport, their CO2 emissions accounting for approxima

I didn't know these numbers, so I had to look them up: * Ships are responsible for 90% of international transport, their CO2 emissions accounting for approximately 2.2% of the global total of such emissions [0] * Aircraft are responsible for 1.9% of greenhouse gas emissions (which includes all greenhouse gases, not only CO2) and 2.5% of CO2 emissions [1] [0] https://orbit.dtu.dk/files/158911010/Working_Paper_4_Emissions_from_Shipping.pdf https://orbit.dtu.dk/files/158911010/Working_Paper_4_Emissio... [1] https://ourworldindata.org/co2-emissions-from-aviation https://ourworldindata.org/co2-emissions-from-aviation