Problem: Bras%C3%ADlia:

In 2014, the airport received 15 new boarding bridges, totalling 28 in all. This was the main requirement made by the federal government, which transferred the operation of the terminal to the Inframerica Group after an auction. The group invested R$750 million in the project. In the same year, the number of parking spaces doubled, reaching three thousand. The airport's entrance have a new rooftop cover and a new access road. Furthermore, a VIP room was created on Terminal 1's third floor. The investments resulted an increase the capacity of Brasília's airport from approximately 15 million passengers per year to 21 million by 2014. Brasília has direct flights to all states of Brazil and direct international flights to Atlanta, Buenos Aires, Lisbon, Miami, Panama City, and Paris.

What did the amount of passengers double to in 2014?
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A: unanswerable


Problem: Mexico City:

In 1980 half of all the industrial jobs in Mexico were located in Mexico City. Under relentless growth, the Mexico City government could barely keep up with services. Villagers from the countryside who continued to pour into the city to escape poverty only compounded the city's problems. With no housing available, they took over lands surrounding the city, creating huge shantytowns that extended for many miles. This caused serious air pollution in Mexico City and water pollution problems, as well as subsidence due to overextraction of groundwater. Air and water pollution has been contained and improved in several areas due to government programs, the renovation of vehicles and the modernization of public transportation.

What did the shantytowns create?
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A: serious air pollution


Problem: Copper:

Compounds that contain a carbon-copper bond are known as organocopper compounds. They are very reactive towards oxygen to form copper(I) oxide and have many uses in chemistry. They are synthesized by treating copper(I) compounds with Grignard reagents, terminal alkynes or organolithium reagents; in particular, the last reaction described produces a Gilman reagent. These can undergo substitution with alkyl halides to form coupling products; as such, they are important in the field of organic synthesis. Copper(I) acetylide is highly shock-sensitive but is an intermediate in reactions such as the Cadiot-Chodkiewicz coupling and the Sonogashira coupling. Conjugate addition to enones and carbocupration of alkynes can also be achieved with organocopper compounds. Copper(I) forms a variety of weak complexes with alkenes and carbon monoxide, especially in the presence of amine ligands.

Coupling products can be made by substituting Gilman reagent with what?
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A: alkyl halides


Problem: Madrasa:

The Arabic term ijāzat al-tadrīs was awarded to Islamic scholars who were qualified to teach. According to Makdisi, the Latin title licentia docendi 'licence to teach' in the European university may have been a translation of the Arabic, but the underlying concept was very different. A significant difference between the ijāzat al-tadrīs and the licentia docendi was that the former was awarded by the individual scholar-teacher, while the latter was awarded by the chief official of the university, who represented the collective faculty, rather than the individual scholar-teacher.

What type of license is closely related to the ijazat al-tadris?
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A:
licentia docendi