| http://www.w3.org/ns/prov#value | - It also requires heavy metals such as lead, mercury, cadmium, and hexavalent chromium and flame retardants such as polybrominated biphenyls (PBB) or polybrominated diphenyl ethers (PBDE) to be substituted by safer alternatives.??? The EU is also exploring expanding WEEE-ROHS so it can tackle the ???fast increasing waste stream of such products.??? Perhaps a similar system is needed so that fossil-
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