Carcinogens are cancer causing agents. Carcinogens approximately cause 83% of cancer. Carcinogens are found in various fumes of metals and in gases. Some of the metals carcinogens are found in are cadmium, nickel, and chromium. All three of those cause lung cancer. Cancer usually develops in the human body after a period of time of being exposed to toxic materials. The most common type of cancer in Vietnam is lung cancer because a lot of people breathe in the toxic metallic fumes in the air. Prostate cancer is a tough cancer to fight off that is caused by carcinogens.
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