1. Inhalation into human body or animal body will harm the respiratory system of human body or animal, cause cancer, enter water or soil and be absorbed by plants, thus endangering human body or animal health.
2. Greenhouse effect: the carbon dioxide content in the atmosphere is too high.
3. Acid rain: The content of SO2 is too high. Acid rain directly hurts the leaves and buds of plants and kills crops and trees.
Ozone layer destruction: nitrogen oxides and chlorofluorocarbons react with ozone.
Air pollution refers to the phenomenon that harmful substances are discharged into the atmosphere, which destroys the ecosystem and normal living conditions of human beings and causes harm to people and things. There are two natural factors (such as forest fire and volcanic eruption). ) and human factors (such as industrial waste gas, domestic coal burning, automobile exhaust, nuclear explosion, etc. ), and the latter is given priority to.
Extended data:
Air pollution refers to the phenomenon that the concentration of pollutants in the atmosphere reaches a harmful level and exceeds the environmental quality standards. All substances that can worsen air quality are air pollutants. At present, there are about 100 kinds of air pollutants. According to their existing state, they can be divided into two categories, one is aerosol pollutants, and the other is gas pollutants.
Aerosol pollutants mainly include dust, smoke droplets, fog, dustfall, floating dust and suspended solids. Gaseous pollutants mainly include sulfur oxides with sulfur dioxide as the main component, nitrogen oxides with nitrogen dioxide as the main component, carbon oxides with carbon dioxide as the main component, and hydrocarbons combined with hydrocarbons. The atmosphere contains not only inorganic pollutants, but also organic pollutants. With the continuous development of new substances, the types and quantities of air pollutants are constantly changing.
References:
What are the air pollution? What is the harm to human body? -People's Network