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Lung Cancer (Symptoms of lung cancer (An ache or pain in the chest or…
Lung Cancer
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Causes of lung cancer
Air pollution
There are many sources include diesel exhaust fumes, nitrogen oxides from vehicles and smoke from wood and coal fires.
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Passive smoking
Exhaled breath from smokers passes carcinogens on to others, both children and other adults. Smoking bans are reducing this.
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Smoking
Tobacco smoke contains many mutagens that cause tumours to develop. Smoking causes nearly 90% of lung cancer cases.
Epidemiology is the study of the incidence and causes of disease. Surveys are used to look for correlations between diseases rates and factors that could be implicated. Correlation does not prove causation but careful analysis cans how whether a factor actually causes a disease.