Human factors are mainly a large number of sulfur dioxide and nitrogen oxides emitted by human activities, especially industrial emissions, transportation emissions, agricultural fertilizer input and so on. These emissions will react with water vapor and oxygen in the atmosphere to form substances such as sulfuric acid and nitric acid. Secondly, it is caused by natural factors, which mainly refer to volcanic eruption, plant decay, ocean evaporation and other phenomena in nature. The ammonia and methane released by these phenomena will interact with nitrogen oxides in the atmosphere, thus forming acid rain.
These air pollutants will have a series of physical and chemical reactions in the atmosphere. Because air and precipitation move and change in different atmospheres, the degree of acidification is different. When these substances combine with water vapor to form fine particles and float in the atmosphere to form clouds and fog, they will fall to the ground with rainfall and form acid rain. Acid rain is a meteorological phenomenon that sulfur dioxide and nitrogen oxides in the air react with water vapor, oxygen and other gases, and then fall to the ground in the form of rain, snow, fog and other water vapor.
Harm of acid rain
Acid rain will destroy the surface of plant leaves, resulting in thinning, yellowing, withering and death of leaves. Acid rain will destroy the structure and quality of soil, affect the activity of soil microorganisms and the absorption of nutrients by plants; Acid rain makes the water of lakes and rivers acidic and destroys the ecosystem in the water body; Acid rain will accelerate the wear, corrosion and fading of building materials such as stone, limestone and concrete, and cause serious damage to cultural heritage; Acid rain will affect people's health to varying degrees by remaining in food and water.