Air pollution has always accompanied civilizations. Pollution started from prehistoric times when man created the first fires. According to a 1983 article in the journal Science, "soot" found on ceilings of prehistoric caves provides ample evidence of the high levels of pollution that was associated with inadequate ventilation of open fires."[2] Metal forging appears to be a key turning point in the creation of significant air pollution levels outside the home. Core samples of glaciers in Greenland indicate increases in pollution associated with Greek, Roman and Chinese metal production,[3] but at that time the pollution was comparatively small and could be handled by nature.
Urban pollution
![800px-Yangzhou_-_induAdverse air quality can kill many organisms including humans. Ozone pollution can cause respiratory disease, cardiovascular disease, throat inflammation, chest pain, and congestion. Water pollution causes approximately 14,000 deaths per day, mostly due to contamination of drinking water by untreated sewage in developing countries. An estimated 500 million Indians have no access to a proper toilet,[43][44] Over ten million people in India fell ill with waterborne illnesses in 2013, and 1,535 people died, most of them children.[45] Nearly 500 million Chinese lack access to safe drinking water.[46] A 2010 analysis estimated that 1.2 million people died prematurely each year in China because of air pollution.[47] The WHO estimated in 2007 that air pollution causes half a million deaths per year in India.[48] Studies have estimated that the number of people killed annually in the United States could be over 50,000.[49]strial_area_west_of_Wenfeng_Temple_-_P1130239.JPG](https://images.ecency.com/p/6pu4ZRycQdDWezzYuk9QQk5myGwXv66QaMf8cduYZSCbo6qxmGHhuc8CM4TrRvXJBxabPdLVe9YQUUcT8Jt4PMfQ7dMBThcPDgZ1YsduotD8aPCQ6XkTrtWRJ2pubUL9YPuunvLQLNHvv1eb7ABD5jVvD2E8s59SetB7YJdUXCBPY5yj2Dj1HWQu4FLrMDVMroDbc?format=match&mode=fit)
Air pollution has always accompanied civilizations. Pollution started from prehistoric times when man created the first fires. According to a 1983 article in the journal Science, "soot" found on ceilings of prehistoric caves provides ample evidence of the high levels of pollution that was associated with inadequate ventilation of open fires."[2] Metal forging appears to be a key turning point in the creation of significant air pollution levels outside the home. Core samples of glaciers in Greenland indicate increases in pollution associated with Greek, Roman and Chinese metal production,[3] but at that time the pollution was comparatively small and could be handled by nature.
Urban pollution
