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Mercury Pollution Prevention
... Primary voluntary goals: Virtual elimination of mercury-containing waste from hospitals' waste stream by 2005. The reduction of the overall volume of waste ...
Mercuric, mercurous and mercurial are all valid adjectives, but there is some specific difference between them (something about valency) that I do not quite understand (I do not specialize in Chemistry). I only wonder whether it is relevant at all in this particular case... :o(