成人论坛

Barnaby Bear starts his sightseeing tour of Mexico City by going to the top of the Latin American Tower. From here he can see that the city goes on for miles and is surrounded by mountains and volcanoes. One of the volcanoes is known as 'Smoking Mountain'. There is a haze across the city which is caused by pollution. Pollution is a big problem in Mexico City. The city lies in a bowl-shaped valley surrounded by high mountains. Approximately five million cars travel in the city every day and the exhaust fumes get trapped by the mountains. Green taxis now use unleaded fuel. People must have emissions from their cars checked and leave their cars at home one or two days per week.