
As the production technologies evolve, smartphone makers are building ever more environment-friendly products. In particular, the iPhone 4S and 5 have been found to be among the phones that use the smallest amount of toxic chemicals. iFixit and HealthyStuff have teamed up to run chemical analyses on a total of 36 devices launched in the past decade, and Apple’s two latest iPhone models hit the top five of the least toxic handsets, alongside Samsung and Motorola products.
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