lets say a dentist uses mercury in his practice, and a fire breaks out, would that be dagenrous for the environment and the residents and the fire brigade who might breathe it in .

Secondly, a separate point, many dentists just flush the mercury down the sink into the local water supply, surely you dont have to be a 'conpspiracy theorist mercury person' to realise they should flush it down a separate water supply, that gets removed safely or collected by specialists who know how to dispose of it.

thirdly, if the answer to my question 1 is yes, it is dangerous, maybe people should start setting fire to dentists to finally get the message out