He did announce a 50% rise in money for household-scale microgeneration schemes.

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But Mr Legrain has a gift for combining big numbers that offer a sense of the scale of the global build-up in things like household debt while zeroing in on what all this means for people like Thorvaldur Thorvaldsson, a proudly left-wing Icelandic carpenter and unlikely sometime property speculator.

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Physical activity was rated on a six-point scale with the lowest being "moving only in connection with necessary household chores, " to heavy exercise or a competitive sport several times a week.

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The same is true of 3D manufacturing devices that allow small-scale producers to get back in the game of producing everything from household goods to complex mechanical proto-types at ever-lower cost.

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