It is the home of several universities, including National Taiwan University, National Taiwan Normal University, and National Chengchi University. In 1967, Taipei annexed the towns of Chingmei, Mucha, Nankang, Neihu, Shihlin, and Peitou. Taipei is one of the most densely populated cities in the world. Overcrowded housing is a problem in the city. Many high-rise buildings have been erected in Taipei, with little concern for zoning laws.
Heavy traffic is another problem.
Air pollution has resulted from motor vehicles and the factories in and near the city. Products made in Taipei include textiles, electrical machinery and appliances, wires and cables, refrigerators, motorcycles, rubber goods, and various handicrafts. More than a dozen airlines serve the nearby Chiang Kai-shek International Airport. Railways and bus lines connect the city to all parts of Taiwan. The Chinese began making large settlements in Taiwan during the 1600's.