Talk about the atmospheric environment in your eyes.

Atmospheric environmental problems include air pollution and water pollution.

1, air pollution problem

In 2000, China's sulfur dioxide emissions were19.95 million tons, ranking first in the world. According to experts' calculations, in order to meet the environmental capacity requirements of the national weather, sulfur dioxide emissions should be reduced by at least 40% on the existing basis. In addition, in 2000, the national soot emission was11650,000 tons, and the industrial dust emission was10.92 million tons. Air pollution is the biggest environmental problem in China.

2. Water pollution

The pollution levels of the seven major water systems in China are: Liaohe River, Haihe River, Huaihe River, Yellow River, Songhua River, Pearl River and Yangtze River, among which 42% of the water quality exceeds Class III standard (can not be used as drinking water source), and 36% of the urban river sections in China are inferior to Class V water quality, which makes them useless. The water quality of large freshwater lakes (reservoirs) and urban lakes is generally poor, and the eutrophication of more than 75% lakes is intensified, mainly caused by nitrogen and phosphorus pollution.

influencing factor

The factors that affect the scope and intensity of air pollution are the nature of pollutants (physical and chemical) and the nature of pollution sources (source strength, source height, source temperature, exhaust rate, etc.). ), meteorological conditions (wind direction, wind speed, temperature stratification, etc. ), and surface characteristics (topography, roughness, ground coverage, etc. ).

The higher the concentration of harmful substances in the atmosphere, the heavier the pollution and the greater the harm. The concentration of pollutants in the atmosphere depends not only on the total amount of emissions, but also on the height, meteorology and topography of emission sources.

Refer to the above? Baidu encyclopedia-air pollution