Valuable metals contained in electronics and green-technology products are being recycled at "discouragingly" low rates, raising the prospect of material shortages, according to a United Nations-sponsored report. The U.N. report, released last week, found a wide disparity in metal recycling rates and very low rates among even highly prized metals, such as gold, from electronics. The study recommends using product designs that make recycling easier and addressing the problem of obsolete electronics. About 18 percent of TVs and PCs are recycled and about 10 percent of cell phones, according to the Environmental Protection Agency.

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