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prices and demand for rare earth materials have risen dramatically over the past decade. china produces about % of the supply. deposits in australia and the united states are going back into operation, and exploration in many new areas is progressing. heavy and light rare earth elements: the rare earth...
diode (led) for backlighting instead. this makes led tvs much slimmer and more energy-efficient and allows for a brighter viewing experience. qled: qled uses quantum dots to produce coloured light and improve picture quality. this type of tv has better screen panel quality than lcd and led but is also...
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