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By witnessing the great migration of our times, we have come to realize that more opportunities and better living standards in urban areas mean that more people need to be accommodated in our cities. The United Nations predicted that half of the world's population would live in urban areas at the end of 2008 and now predicts that by 2050 about 64% of the developing world and 86% of the developed world will be urbanized. However, cities involve complicated systems, can be highly unsustainable, and also affect the health of people that it inhabits as well as the environment. Be it transportation, high-density construction, access to safe food, good air quality, waste production, and so on. Green Initiatives is privileged to have Simon Ng and Robert Gottlieb, authors of ‘Global Cities: Urban Environments in Los Angeles, Hong Kong and China’ with us in Shanghai this
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