Direction: Read the following passage carefully and answer the questions given below it in the context of the passage.

Everyone is exposed to numerous chemical pollutants every day. Some accumulate and most of us have a large number of chemical pollutants stored in our bodies. We attempt to manage this toxic burden through our natural detoxification systems, but if the burden is too much, some of our cells function abnormally or die. The World Health Organization has stated that pollution exposure is the fifth most common contributor to developing chronic diseases, after tobacco use, harmful use of alcohol, unhealthy diets, and physical inactivity. These diseases include the most common chronic cardiovascular, respiratory and neurological diseases. Daily pollution exposures can get into the brain and impact brain cells. The effect can be cell death, leading to neurodegenerative disorders, like Parkinson’s and Alzheimer’s disease. These exposures can also induce sensitization. When this occurs, these people describe a heightened sense of smell and develop symptoms after exposure to numerous different chemicals commonly found in the air.