According to the United Nations, the beginning of 2007 marked a dramatic demographic turning point. For the first time in human history, more than half of humanity is living in cities with millions more moving from the countryside to urban areas every year.
Nowhere is this trend more striking than in China, where some 8.5 million peasants every year move from the countryside to the country's mushrooming cities. Many of these vast, teeming urban centres remain unknown outside China. But their sheer number – more than 90 cities over 1 million inhabitants – shows the scale of urbanisation in China.
One city stands out from the rest by virtue of its size and the speed at which it is growing. Nestled in a huge bend in the Yangtze River at its confluence with the Jialing River, Chongqing has become the most populous municipality in the world, home to some 32 million people – more than the entire populations of Peru or Australia.
The population of the city is growing so fast that municipal authorities have pushed through the construction of 8 new bridges, 8 railway lines and 8 highways servicing the city in the past 5 years, spending an average of $ 1 billion every year, a pace of investment they are hoping to sustain for the coming decade.
Markel Redondo documented the ruptured landscapes of the city's breakneck development and its effect on the local population.