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One of the scariest things in the world is to find out that you or a loved one has cancer. There are many ways cancer can develop, however the cause that interested me the most is when a chemical called a carcinogen causes cells to lose control of their normal function, leading to cancer. Carcinogens are defined as any substance or agent that can trigger cancer in animal tissue. Carcinogens are everywhere – they can be organic, such as certain molds and viruses, and they can also be inorganic, such as asbestos and arsenic. Certain types of radiation, such as ultraviolet and X-rays, are also types of carcinogens. Tobacco smoke that is inhaled, as well as DDT and other pesticides that are absorbed through the skin, are considered carcinogens. It has been