Environmental and Occupational Health

The two most dangerous chemicals as far human health is concerned are Polychlorinated biphenyls and pesticides. Polychlorinated biphenyls (PCBs) are always available in the environment, and they lead to cancer and impaired development of the brain. The primary source of PCBs is farm salmon from fish. Pesticides are also harmful to human health as 60% of herbicides, 30% of insecticides and 90% of fungicides are carcinogenic ( Lowry, 2017).    Today, pesticide residue is present in United States foods. Pesticides cause cancer, miscarriages, congenital disabilities, nerve damage, and Parkinson's disease. Pesticides are prevalent in foods such as vegetables, fruits, and commercially reared meats together with bug spray. To prevent PCBs, people should avoid consuming farm-raised salmon or consume in measured amounts. On the other hand, avoiding pesticide chemicals entails thoroughly washing and cleaning foods sprayed with pesticides ( Lowry, 2017).    For instance, fruits and vegetables should be checked and washed immensely before consumption. 

There is a notion to believe that if only little amounts of a chemical are required to result in poisoning, then the hazards connected with exposure to the chemical are considerably high. This is not necessarily the case. A high toxicity chemical can have a reduced risk to health if it is applied with suitable safety measures ( Lowry, 2017).    On the other hand, it is likely that a chemical of reduced toxicity might present a considerable danger to health if it is used unsuitably or incorrectly. Biomonitoring includes the application of organisms to evaluate environmental contamination, including surrounding water or air. Biomonitoring  assists in exposure assessment of precise   chemicals , description of exposure trajectories and potential problems. Biomonitoring is interpreted at individual or group levels ( Lowry, 2017).   

References 

Lowry, G. G. (2017).    Handbook of hazard communication and OSHA requirements . Routledge.