1:3:6 for cars, trucks, and planes respectively. This means that cars contribute the least amount of aerosol emissions, followed by trucks, and then planes. However, it is important to note that while cars may have a lower contribution on an individual basis, there are far more cars on the road than there are trucks or planes, which can lead to a significant overall impact.
Additionally, it is important to consider the type of fuel being used by each mode of transportation. For example, diesel-powered trucks typically emit more particulate matter than gasoline-powered cars. Similarly, older planes with less efficient engines may emit more pollutants than newer models.
Overall, reducing transport-related aerosol emissions requires a combination of strategies such as promoting alternative modes of transportation (e.g. public transit, biking), increasing fuel efficiency standards for vehicles and aircrafts, and transitioning to cleaner fuels (e.g. electric vehicles).
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