In Europe, regulations for lead-free computing such as RoHS (Restriction of Hazardous Substances) and WEEE (Waste Electrical and Electronic Equipment), are designed to reduce the effects of hazardous waste. Yet many U.S. PC makers have all but ignored the problem. That’s where you can help. Building a green PC means you can be part of the solution by using all lead-free parts that are also more energy-efficient.
I think this will be far more difficult for enthusiasts than the “average Joe”, but it is good food for thought if you want to try to make your computer just a wee bit more environmentally friendly.
Source: Extreme Tech