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ensure accuracy. Advancing the Science of Climate Change ROLE OF
TRANSPORTATION IN DRIVING CLIMATE CHANGE A large proportion of
GHG emissions can be attributed to transportation, specifically
from the burning of gasoline, diesel, and other fuels derived
from petroleum. In fact, the transportation sector is
responsible for 70 percent of U.S. petroleum use, which exceeds
the percentage of oil that is imported (Davis et al., 2008).
Reducing transportation’s dependence on petroleum, much of it
imported from politically unstable regions of the world, is one
of the most direct connections between the issues of climate
change, energy security, and national security (see Chapter 16).
Transportation’s use of petroleum fuels also leads to emissions
of particulate matter, sulfur dioxide (which forms sulfate
aerosols and ultimately leads to