Although governments don't control everything that has to do with transportation, they still have a fair amount of influence over it. And when it comes to cutting greenhouse gas emissions, transportation is one area in particular in which the industrialized nations can make dramatic changes — largely because they use some of the most inefficient forms of transportation on the face of the Earth!
Different levels of government control different pieces of transportation. City governments, for example, control the public transit and city vehicles, which include public-service vehicles, such as park vehicles, snow plows, and garbage trucks. National governments can decide that a vibrant national rail system matters — moving people quickly and reducing greenhouse gases. National governments can also control what kind of cars are sold in the region or in the country, where and whether highways or rail lines are built or upgraded, and how many lanes of traffic are dedicated to multiple-passenger cars on the highway.
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