Mariano Bauer, from Universidad Nacional Autonoma de Mexico, emphasized that while Mexico may be following some of the same transportation trends as the United States and Canada, it is on a very different point in the development curve. For instance, there are more cars in the state of California than in the entire country of Mexico, and the dominant form of transportation in Mexico City is the ‘microbus ', not private vehicles. This difference is reflected in Mexico's much lower per capita CO2 emissions ( Figure 2 ). Bauer also reminded participants that, in addition to the many economic, technological, and demographic forces influencing the evolution of the transportation sector, there are less quantifiable cultural forces that play just as big a role in shaping trends.

Figure 2. CO2 emissions per capita, coming from different segments of the transportation sector in the United States, Canada, and Mexico. From Lee Schipper, International Energy Agency.

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