The conduits, which are spooled in big stacks on a boat before being buried in an underwater trench, are a crucial part of the grid as demand for electricity increases. Credit...Video by Juho Kuva ...
UNTIL 1700 the world economy did not really grow—it just stagnated. Over the previous 17 centuries global output had expanded by 0.1% a year on average, a rate at which it takes nearly a millennium ...
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