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Energy use in the transport sector accounts for nearly 25% of global energy-related carbon dioxide (CO2) emissions—a share that could rise sharply over the next few decades absent strong action (IEA 2008a). Given current trends, transport energy use and CO2 emissions are projected to increase by nearly 50% by 2030 and by more than 80% by 2050.
These transport trends could be substantially modified through the widespread adoption of best-available technologies in the near term and through the longer-term development and deployment of a range of new technologies, including lower-carbon fuels and electricity. Such a transition would require complementary policies to ensure rapid uptake and utilization of these technologies. In short, significant efforts by industry, governments, and consumers, both individually and in collaboration, are essential to reversing the climate change impacts of vehicles.