Paris for 31 percent of the GDP of France. According to the Economist Intelligence Unit Worldwide Cost of Living Survey in 2018, Paris was the second-most expensive city in the world, behind Singapore and ahead of Zurich, Hong Kong, Oslo and Geneva. The city is a major rail, highway, and air-transport hub served by two international airports: Paris-Charles de Gaulle (the second busiest airport in Europe after London Heathrow Airport with 69.5 million passengers in 2017) and Paris-Orly. Opened in 1900, the city's subway system, the Paris Métro, serves 5.23 million passengers daily, and is the second busiest metro system in
Teresina Airport Teresina Airport Teresina–Senador Petrônio Portella Airport is the airport serving Teresina, Brazil. Since December 22, 1999 it is named after Petrônio Portella Nunes (1925-1980) a former Mayor of Teresina, Governor of Piauí, Senator and Minister of Justice who had a key role in preparing the end of the Brazilian military government. It is operated by Infraero. The airport was opened on September 30, 1967 and since December 23, 1974 it is operated by Infraero. The airport underwent major renovations between 1998 and 2001, including the passenger terminal, runway and the construction of a new control tower. The airport is located