It is asthma that occurs in childhood age. The bronchial tubes in the lungs have become very sensitive, and the bronchial tubes have narrowed, so the patient wheezes and coughs for a long time, and complains of breathlessness and chest tightness. These symptoms are characterized by repetitive and seizure. In particular, when coughing is the main symptom and responds well to asthma treatment, it is also called asthmatic bronchitis. Basically, childhood asthma is similar to adult asthma in the mechanism of occurrence and triggering factors, but there are differences in diagnosis methods and prognosis. It is known that allergic inflammatory reactions are involved in the pathogenesis and are affected by both genetic and environmental factors.

Lung cancer is one of the serious diseases caused by pollution. The disease is characterized by abnormal growth of cells in one or both lungs, greatly reducing the lung's capacity to carry oxygen, ultimately leading to complete respiratory failure. Common symptoms of lung cancer include changes in voice, frequent chest infections, shortness of breath, and wheezing.

Leukemia is caused by severe exposure to benzene vapors present in contaminated air. In this disease, white blood cells begin to grow out of control and push out red blood cells and platelets, which are important for the body to stay healthy. The worst thing about this disease is that some patients who develop gradually do not show any symptoms, making early diagnosis difficult. Common symptoms of leukemia include fatigue, headache, vomiting, weight loss, night sweats, difficulty breathing, bruising or bleeding easily, and bone pain.

Acid rain is a very strong acidic substance that is absorbed by rain. It damages to the underwater ecosystem occurs. Aluminum eluted from the soil flows into the lake, which poses a great threat to species. If the pH is lowered below 5, most fish cannot hatch eggs.The damage to the soil becomes serious. If basic cations are insufficient, plants cannot grow normally. If the pH is below 5, photosynthesis of rice, wheat, and barley decreases. Food production decreases below pH 4 and vegetable yields such as radishes and carrots decrease.

In general, people are not fully aware of the dangers of nitrogen, but nitrogen can cause problems as serious as carbon. In addition, due to the interaction between nitrogen and carbon, food and energy crop cultivation activities further harm the environment. Nitrogen occurs naturally in the environment and accounts for 78% of the Earth's atmosphere. There is no risk in the inert form, but the huge amount of nitrogen and nitrogen oxides emitted during the combustion of fossil fuels or the production of large amounts of fertilizers is extremely active. As active nitrogen builds up in the environment, it can have as serious consequences as carbon dioxide emissions.