Transport emissions in the U.S. - statistics & facts

The transportation sector has various direct and indirect impacts as well as cumulative impacts on our environment. Direct impacts are well understood by the general public, for example, how increased carbon dioxide emissions amplify the greenhouse effect. However, one is often not aware of indirect and cumulative impacts, such as the particulate pollution that is emitted from vehicle engines and how these emissions can lead to cardiovascular and respiratory problems. Emissions can have consequences on both the environment and human health.

Transport makes up the majority of emissions in the U.S. Transportation includes cars, trucks, trains, planes and boats, where the road transportation is the main constituent in transportation emissions, especially cars. In comparison to parts of the western world, the U.S. relies heavily on motorized transit rather than other modes of transport such as bicycling or walking. Additionally, the majority of U.S. citizens commute to work using private vehicles.

Transport emissions include not only carbon dioxide, but also nitrous oxide, nitrogen oxide, methane, hydrofluorocarbons (HFCs), perfluorocarbon (PFCs), and sulfur hexafluoride (SF6). These greenhouse gases are significant contributors to climate change which has led to extreme temperatures, rising sea levels and an increase in ocean temperature, increase in heavy precipitation and shrinking glaciers. Climate change threatens global ecosystems including animal and human life. The U.S. have established several regulations and agreements for environmental protection however, President Donald Trump decided in 2017 that the United States would cease all participation from the 2015 Paris Agreement. In order for the U.S. to lower transportation emissions, enhancing or subsidizing transport electrification and energy efficiency is essential for making the transportation industry more environmentally conscious.

Interesting statistics

In the following 5 chapters, you will quickly find the 25 most important statistics relating to "Transport emissions in the U.S.".

Transport emissions in the United States

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Important key figures

The most important key figures provide you with a compact summary of the topic of "Transport emissions in the U.S." and take you straight to the corresponding statistics.

Fuel consumption


Passenger vehicles

Other transport emissions


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