Are Cities Alive?
James Lovelock first coined the term Gaia, a word that means viewing the Earth as a single living, breathing organism. A new scientific trend views the world’s biggest cities the same way. More than half the world’s population today lives in cities, and the world’s largest urban areas are growing rapidly. The number of megacities (metropolitan areas with populations exceeding 10 million) has grown from just 3 in 1975 to about 20 today.
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