Zurich's Federal Institute of Technology (ETHZ) has launched a collaboration with two universities in Singapore in an effort to produce a template for the modern sustainable city.Many of today's cities are reaching breaking point in terms of pollution and sheer numbers of people, according to ETHZ professor for architecture Gerhard Schmitt.
"Cities provide living space for more than half of the world's population, and this rate is set to rise. They produce half of the economic output but also half of the pollution," Schmitt told swissinfo.ch.
"This leads us to the conclusion that cities are no longer sustainable no matter where they are. We know the more they expand the more quality falls. There is a limit of size."
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