I need your help,best wishes for you Environmental contamination and lung cancer The author holds that there is a firm relation between environmental contamination and lung cancer and suggest us protect environment for our health.Many epidemiological investigations showed that the occuring rate of lung is increasing while the rate of many other kinds of cancer is going down.There is a firm relation between the rising rate and environmental contamination according to lots of investigations.Due to the chronic procedure of the development of the environment related disease,the ignoration of the relation between the pollution and disease happens unconsciously. Environmental contamination,expecially air pollution,is responsible for the the occurence of lung cancer,because lung is exposed to the air directly.With the quality of our lives rising,however,the rate of lung cancer occurency becomes higher and higher,expecially in advanced countries.Lung cancer is a common melignant tumer which takes away about 1.1 millions lives every year. Among all kinds of pollution substance,particles have the strongest relation to the epidemiology.PM10 and PM2.5 can increase the risk of lung cancer and PM2.5 is more harmful.With the development of transportations,inevitably,there will be more PM2.5 in the air. In conclusion,there is a strong relation between environmental contamination and our health.Protecting environment is protecting ourselves.