| http://www.w3.org/ns/prov#value | - The main reason for that is the lead, mercury, cadmium, chromium and other heavy metals that are contained in the components of almost every electronic device, These metals could pollute groundwater, surface water or the air when electronics are burned or, if they are buried in the ground, which may have an hazardous effect to the environment, that is why all discarded electronics must be recycled
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