Causes+of+Lung+Cancer

=The Causes of Lung Cancer= = =

===**As the leading cause of most respiratory diseases, tobacco is responsible for 90% of all lung cancer in the world. Since tobacco contains more than 63 carcinogens (substances that lead to cancer), it directly impacts on one's likelihood of getting lung cancer. In America, tobacco leads to 90% of lung cancer in men and 85% of lung cancer in women. The average life long risk for smokers to get lung cancer is 11.6%, which is significantly higher than the average life long risk of 1.7% for non-smokers.**=== ======

 

__Radon: Second Leading Cause of Lung Cancer__
===Radon is responsible for 21,000 lung cancer deaths annually. It is actually the decay product of uranium and occurs naturally in soil and rocks. Often times they appear in our homes while constructing. Most radon caused lung cancers are among those who smoke as they are more vulnerable against any harms to the respiratory system. However, there are also many deaths in non-smokers that have lung cancer because of radon as well. 2,900 people who died out of 21,000 people who died have been non-smokers. The World Health Organization (WHO) estimates that 6-7% of worldwide lung cancers are caused by radon gas.===

__Second Hand Smoking: Something We Do not Realize__
==== **Most people think if you do not smoke you would not get associated with tobacco, however these years scientists have discovered that second hand smoking, which is breathing in smoke from the environment by other smokers, is more deadly than personally smoking the cigarette, especially to young children. Since more chemicals gets exposed to the air when the smoke gets breathed out from a smoker, premature children and teenagers have been found with lung cancer. Second hand smoke causes for 3,400 deaths of lung cancer deaths in the United States, including 2,907 patients under 18.** ====

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