An environmental or occupational toxicant that effects either the respiratory, immune, or hepatic system.

Research and identify an environmental or occupational toxicant that effects either the respiratory, immune, or hepatic system. Research and discuss the following:
Explain the normal function of the system and what makes it susceptible to toxicity.
Describe how exposure to the toxicant is possible.
Analyze the acute and/or chronic effects of the toxicant.
Describe recent concerns about the toxicant (within the last two years) and any actions taken to reduce the toxicant in the environment or reduce occupational exposure to the toxicant.