An article by Gaia Vince
BBC

The growing number of cities on the planet could provide a solution to many of our environmental and social problems – if we re-think the way they operate.

We are living in a uniquely urban time in Earth’s history. In 1800, and for a thousand years before, just 2% of the world’s people lived in urban areas. Within the past five years, we have reached the point where more people are living in cities than in rural areas. By 2050, around three-quarters of the estimated 10 billion people on Earth will live in cities. It’s by far the biggest migration in human history, and it’s well underway.

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