From ocean to ozone: Earth’s nine life-support systems

New Scientist: EARTH'S NINE LIVES UP TO now, the Earth has been very kind to us. Most of our achievements in the past 10,000 years - farming, culture, cities, industrialisation and the raising of our numbers from a million or so to almost 7 billion - happened during an unusually benign period when Earth's natural regulatory systems kept everything from the climate to the supply of fresh water inside narrow, comfortable boundaries. This balmy springtime for humanity is known as the Holocene. ......

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