A. The northern Italian city of Milan has the third largest economy among European Union cities and the largest among European non-capital cities. It is in Lombardy, the most populous and richest region in the country and one of the richest regions in central Europe.

Q: Besides Milan's three-day ban on all vehicles from  from 10am to 4pm, the capital city of Rome imposed a partial driving ban based on odd- or even-numbered vehicle plates. Which city has more people, Milan or Rome?

A. Milan

B. Rome

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B. Located in central Italy, the city of Rome has about 2.8 million people compared with Milan's population of about 1.3 million. Experts say unusually calm and dry weather in Italy means that air pollution is not being dispersed.

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Q: Besides Rome, what other national capital has restricted vehicle traffic because of severe air pollution?

A. Beijing

B. New Delhi

C. Madrid

D. All of the above

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D. Choking smog has forced the capitals of China, India and Spain to restrict traffic.

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Q: Last month, the use of wood-fired pizza stoves was banned in San Vitaliano, just outside Naples. Italy's third largest city is located near Vesuvius, which is a . . .

A. Peninsula

B. Bay

C. Volcano

D. Sea

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C. Mount Vesuvius in the Gulf of Naples is the only volcano on the European mainland to have erupted within the last hundred years. Today, it is regarded as one of the most dangerous volcanoes in the world because of a population of 3 million people living nearby.

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