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Home-building was more labor-intensive then because of cruder tools and equipment, materials were harder to come by and houses were smaller because they didn't include bathrooms or kitchens.
WSJ: Moving Heaven and Earth for a House��WSJ Mansion
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In 1994, North Korea agreed to stop making plutonium, in return for which America and its allies would supply the country with fuel oil and build two Western-designed light-water nuclear reactors (since it is a bit harder to produce weapons-grade materials from such reactors than from the ones North Korea had been building).
ECONOMIST: Not a final deal, just a start | The
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TVs and monitors are harder to recycle because of the lead and other hazardous materials they contain.
BBC: Computer mountain graphic