Transport CO2 emissions shares by type| ��ƽ��

Distribution of carbon dioxide emissions produced by the transportation sector worldwide in 2024, by sub sector

Characteristic	Share of emissions
Road transportation	74.33%
International aviation	6.37%
Domestic aviation	3.53%
International shipping	6.12%
Domestic shipping	4.55%
Rail	1.05%
Other transportation	4.05%

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Release date

July 2025

More information

Region

Worldwide

Survey time period

2023

Special properties

Based on estimated total emissions of nine GtCO₂

Supplementary notes

The source did no provide a release date and is therefore set as date of site access.

Citation formats

Transportation produced approximately nine billion metric tons of carbon dioxide (GtCO₂) worldwide in 2024. Road vehicles were the biggest sector's polluters by far, making up three-quarters of total transportation-related emissions that year. Shipping followed, with international and domestic maritime emissions accounting for a combined share of 11 percent of emissions.

Road transportation emissions

Emissions from passenger vehicles increased by around 20 percent between 2010 and 2023 to 3.2 GtCO₂, making them the biggest contributors to global road transportation emissions. Heavy duty trucks are also major polluters, releasing almost two GtCO₂ worldwide annually.

Where are transportation emissions highest?

The United States is the largest producer of transportation emissions worldwide. In 2024, U.S. transportation sector emissions totaled 1.9 GtCO₂. U.S. transportation emissions have decreased by more than eight percent since peaking in 2007.