During the next decade or so, our cities will expand at an inconceivable speed. According to the UN’s 2019 World Population Prospects, our planet by 2030 is expected to have 43 megacities —classified as those with more than 10 million inhabitants. Most megacities will be in developing countries. And by mid-century, almost 70 percent of the world’s population will be urbanised, with today’s rate at just over half. Moreover, 90 percent of the urban population growth is expected to happen in Africa and Asia.

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