Cairo is one of the most important megacities in the whole world. Before defining Cairo as a megacity, we have to determine the definition of megacities as a whole. They are cities that have a great increase in population with the beginning of the year 2000. According to the most current United Nations estimates there are about 23 megacities, 18 of them are in developing countries. They are becoming more pivotal because they determine how we will live on this planet on that new century. This century is not the century of small areas. It is of huge cities, which have significant and complicated problems that have to be resolved by constructing well-planned projects.

Cairo has many crucial problems, consequently; it has to be considered as a megacity. Overpopul

The situation is very sensitive in industrial areas. Howes said, "not surprisingly, the highest levels of lead particles have been found in industrial areas, especially Shubra Al Kheima, where there is a heavy concentration of lead smelters." He added that this is the reason why the project is a long-term monitoring effort. But Howes also said that they are monitoring to get a baseline. Hopefully in a year or two, they can report a significant reduction in Shubra Al Kheima air pollution.

ation, traffic problems and all kind of pollution are notable problems in Cairo. In my point of view, air pollution is a very weighty problem that is capable of defining Cairo as a megacity. It is the air dust in the throat, black clouds of cars and bus exhaust, and some days a gray haze hangs over this swelling metropolis, which make up the problem. "The biggest hazard facing Egypt today is air pollution," Salah Hafez said, executive director of the Official Egyptian Environmental Affairs Agency (EEAA).

The Cairo Air Improvement Project CAIP (which is funded by the USAID) is also working with the Cairo Transit Authority and the Greater Cairo Bus Company to switch their buses to gas operating buses. This program is being carried out in collaboration with the petroleum ministry. James Howes, the CAIP Air Quality Manager said that aside form being cleaner than other fossil fuels, the compressed natural gas is a good strategic option for Egypt, which has extensive reserves of natural gas.

According to a report released last September by the United States Agency for Internatio

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