Air pollution in China, what are the causes? (Series 3/4)

The main source of air pollution in China are:


(1) Industrial: Industrial production is an majorsource of air pollution. Electric power plants, industrial facilities released varies types of pollution into the air, including soot, sulfur oxides, nitrogen oxides, organic compounds, halides, carbon compounds.


(2) Stoves and heater: Many people in northern part of China use large amounts of coal to fuel their heater, coal combustion process will release large amounts of dust, sulfur dioxide, carbon monoxide, and other harmful substances that will pollute the atmosphere.


(3) Transportation: cars, trains, airplanes, ships are the main form of modern transportation, their exhaust gas from burning coal or oil is also an important source of pollution. Especially in urban area, where cars are in large number and concentrated, the problem of PM 2.5 became extremely serious, because they can be inhaled deep into and accumulate in the respiratory system.

The harmful particles that cars emitted  including: carbon monoxide, sulfur dioxide, nitrogen oxides and hydrocarbons, the first three substances are specifically dangerous.

(4) Forest fire smoke

http://news.discovery.com/earth/china-pollution-how-bad-can-the-air-get-151209.htm

http://berkeleyearth.org/wp-content/uploads/2015/08/China-Air-Quality-Paper-July-2015.pdf