I’m fascinated by the fact the Earth-system is a massive conduit of power, with energy flowing into the system in the form of sunlight, flowing out of it as infrared. The flow involved is simply extraordinary: 120,000 terawatts. That’s 10,000 times the amount that flows through our industrial civilisation – all the world’s reactors, turbines, cars, furnaces, boilers, generators and so on put together.
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