Present detailed discussion concerning a current environmental issue (e.g., indoor air pollution, outdoor air pollution, water sanitation, water shortage, food sanitation, direct or indirect food additives, noise, radiation, garbage, biohazards, occupational hazards) that is impacting the populations of the world and public health. What is a law that has been enacted to protect the public regarding the environmental issue? What is the purpose of the law, and what impact does the law have on the public's health?