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1. Which transportation option provides the most miles emissions that you are responsible for generating over the
traveled per unit of carbon dioxide emitted? course of a year. Which transportation option accounts
2. Clearly, it is unlikely that any of us will walk or bicycle for the most emissions for you?
12,000 miles per year or travel only in vanpools of eight 3. How could you reduce your CO emissions? How many
2
people. In the last two columns, estimate what propor- pounds of emissions do you think you could realistically
tion of the 12,000 annual miles you think that you actu- eliminate over the course of the next year by making
ally travel by each method, and then calculate the CO changes in your transportation decisions?
2

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CHAPTER 13 • THE URB AN ENVIR ONMENT : CREATING SUSTAIN ABLE CITIES

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