Apple’s ninth annual Environmental Responsibility Report summarises the company’s work on its three environmental priorities of renewable energy, safer materials & processes and conserving resources. As part of the third of those, the company revealed that its recycling program last year recovered 89 million pounds of materials – Business Insider noting that this included a cool $40M worth of gold.

Gold is commonly used in circuit boards because it has low electrical resistance and, unlike copper, doesn’t corrode. In most applications, a thin layer of gold covers a thicker layer of copper – which was a second valuable material recovered by Apple …

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