Australia, China, Norway, South Korea, Switzerland, Thailand, and the U.S. state of California are among the places that are considering, or have already passed, legislation limiting the use of hazardous substances in electrical and electronic products. European Union RoHS (Restrictions of Hazardous Substances) in electrical and electronic equipment and WEEE (Waste Electrical and Electronic Equipment) took effect in July 2006, and a revision of those directives is currently under consideration.

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