Sulfur dioxide & nitrogen dioxide can cause problems such as asthma, dry coughs, headaches, eye, nose, and throat irritations. Acid rain can also damage or irritate our lungs. It can cause liver problems and can give you diarrhea. Acid rain is more dangerous to older people and to people who have heart problems or heart disease or problems with the respiratory system. It is dangerous for people who have problems with their respiratory system because sulfur goes in the acid rain and then it goes in you which then damages your cells and than damages your respiratory system. In addition, it can also affect humans because the acid goes into fruits, vegetables and animals. In another words, if acid rain doesn't stop and we eat these things we can get very sick. Generally, people are harmed by acid rain but not directly. In the Western United States, there is more sulfur dioxide put in the air which is why the visibility is lower than in the East.