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Diseases caused by pollution, lead to the chronic illness and deaths of about 8.4 million people each year. However, pollution receives a fraction of the interest from the global community. This is in part because pollution causes so many diseases that it is often difficult to draw a straight line between cause and effect.
There are many types of pollution-related diseases, including those caused by air pollution, contaminated soil, water pollution and lacking water, sanitation and hygiene (WASH). Air pollution can be reduced.
According to the World Health Organization (WHO), air pollution is linked to 7 million premature deaths. Here is a breakdown by the diseases air pollution causes:
According to the Centers for Disease Control and Prevention (CDC): "Waterborne diseases are caused by pathogenic microbes that can be directly spread through contaminated water. Most waterborne diseases cause diarrheal illness [Note: not all diseases listed below cause diarrhea]. Eighty-eight percent of diarrhea cases worldwide are linked to unsafe drinking water, inadequate sanitation or insufficient hygiene. These cases result in 1.5 million deaths each year, mostly in young children. The usual cause of death is dehydration. Most cases of diarrheal illness and death occur in developing countries because of unsafe water, poor sanitation, and insufficient hygiene. Other waterborne diseases do not cause diarrhea; instead these diseases can cause malnutrition, skin infections, and organ damage.
Main article: Waterborne diseases
Main article: WASH § Health_aspects
Sources of lead poisoning/pollution include mining, smelting, manufacturing and recycling activities.
Arsenic is a naturally occurring element and can be found in food, water, or air. There are also industrial sources of arsenic, including mining and smelting. "People are exposed to elevated levels of inorganic arsenic through drinking contaminated water, using contaminated water in food preparation and irrigation of food crops, industrial processes, eating contaminated food and smoking tobacco. Long-term exposure to inorganic arsenic... can lead to chronic arsenic poisoning. Skin lesions and skin cancer are the most characteristic effects."