Why are carbon compounds that contain mercury and a greater environment concern than elemental mercury? ... ?

Firstly mercury found in carbon compounds is more easily ingested and taken up by fish and therefore eaten by people causing poisoning. Found within carbon compounds it is also more likely to move up the food chain and become more concentrated.

Firstly mercury found in carbon compounds is more easily ingested and taken up by fish and therefore eaten by people causing poisoning. Found within carbon compounds it is also more likely to move up the food chain and become more concentrated.