申論題內容
(二) Scientists have invented a magical gadget that sucks the ink off printer
paper so each sheet can be used ten times over. They aim to cut the amount
of planet-heating carbon dioxide emissions from the paper and pulp
industry by reducing the demand for office paper. The trick is a kind of
specially coated paper, which stops ink from soaking into the page. A
powerful laser then vaporizes the ink.
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