You can be dehydrated that can lead to a difficulty in breathing. This can lead to heart attacks that can cause death to people.
The items that can contribute to heart disease is C. Nitrogen oxides and carbon monoxide. These are the chemicals that contribute to pollution. Carbon monoxide is the product from a combustion that can affect our respiratory system whenever we inhale this gaseous chemical. And nitrogen oxides can affect and penetrate areas of the body when inhaled in which our respiratory organs may be affected by diseases because of this chemical.
Answer:
Piercing your ears with a needle that has been washed thoroughly with soap and water
