The Cause and the Cause and Prevention of Cancer

The main cause of cancer particularly because of internal factors: External factors: Chemical carcinogens such as polycyclic aromatic hydrocarbons (mainly exists in the modern industrial and modern transport emissions and cigarettes, Xunkao food); aromatic amines and azo dyes category (stored in the textile printing and dyeing, cosmetics); Asia Glass amines (widespread in the food system), metals (asbestos-containing products containing chromium compounds and polycyclic aromatic hydrocarbons of high, which can be carcinogenic). Physical factors, such as ionizing radiation (including medical and occupational exposure); long-term exposure, such as the sun.