Mega-cities: with a population of 11 million, Sao Paulo, Brazil, is part of a new wave of mega-cities. Global truck and bus manufacturer Scania is developing solutions to keep such cities moving

摘要

Welcome to the age of the mega-city. The world's population is growing steadily, particularly in urban areas. In 1950, there was just one city on earth with a population greater than 10 million; today there are more than 25. The United Nations predicts that by 2025 there will be 40 such mega-cities, providing homes to some 630 million people. These urban areas are at risk of grinding to a halt under the weight of their populations, threatening sustainability and the inhabitants' levels of comfort.