In 2020, the CO2 equivalent emissions from on-road vehicles were more than 9 Gt. Accounting for almost one- fifth of global CO2 emissions, on-road vehicles have become one of the major CO2 contributors.
https://www.tgoop.com/WorldWar3Telegram/444

More than that, light duty vehicles – mostly passenger cars – release more CO2 than any other form of transport, including heavy duty vehicles, and twice as much as the combined carbon emissions of aviation and shipping
https://www.tgoop.com/PollutionFacts/1275
https://www.tgoop.com/PolestarTelegram/267

A passenger car needs about 20,000 – 30,000 components and parts, making the supply chain of the automobile industry long and complex.13 Specifically, iron and steel are the most emission-intensive components for both ICE vehicles and BEVs, releasing around 1.7 tons of CO2 for each vehicle
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https://www.tgoop.com/MissionPlaneta/57
https://www.tgoop.com/MissionPlaneta/58

The most recent report from the Intergovernmental Panel on Climate Change (IPCC) shows that emissions of GHGs from human activities are responsible for approximately 1.1°C of warming since the 19th century
https://www.tgoop.com/PollutionFacts/1232
https://www.tgoop.com/PollutionFacts/1242
https://www.tgoop.com/SocialNetworkFacts/10