The harm of air pollutants to human body is various, mainly manifested in respiratory diseases and physiological dysfunction, as well as the irritation of mucosal tissues such as eyes and nose.
2. Water pollution
If we drink polluted water, pollutants will enter our bodies, leading to acute or chronic poisoning and many infectious diseases.
Extended data
The atmospheric environment in China is facing a very severe situation, and the total amount of air pollutants discharged remains high. 20 1 1 year, the annual emission of sulfur dioxide in China is as high as18.57 million tons, dust1/kloc-0.59 million tons, industrial dust1/kloc-0.75 million tons, and the air pollution is still very serious. The atmospheric environmental quality of most cities in China has exceeded the national standards.
Among the 47 key cities in China, more than 70% of the cities' atmospheric environmental quality can't meet the second-class standard stipulated by the state. Among the 338 cities participating in environmental statistics, there are 137 cities whose air environmental quality exceeds the national third-class standards, accounting for 40% of the statistical cities, which are seriously polluted cities. Air pollution is the biggest environmental pollution problem in China.
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 has no use value.
The water quality of large freshwater lakes (reservoirs) and urban lakes is generally poor. The Yellow River has been cut off for many times, and more than 75% of the lakes are more eutrophic, which is mainly caused by nitrogen and phosphorus pollution.
Baidu Encyclopedia-Top Ten Environmental Problems in China