A Carcinogen is any substance, radionuclide, or radiation that is agent directly involved in causing cancer. Causing Cancer may be due to the ability of damage the genome or disruption of cellular metabolic processes. Several substances that are radioactive are considered carcinogens, but the carcinogenic activity is attributed of the radiation. For example:Gamma Rays and Alpha particles, which emit. Also, common examples of non-radioactive carcinogens are inhaled by asbestos, certain dioxins, and mostly tobacco smoke. However, although the public generally associates carcinogenicity with the synthetic chemicals, it is mostly equally to rise in both natural and synthetic substances. Carcinogens are not exactly necessarily  toxic,immediately,but therefore the effect can be insidious. Also the pubic associates generally with carcinogens of synthetic chemicals,it’s equally to rise with both natural and synthetic substances. Sometimes,carcinogens may usually increase the risk,that is high of cancer by altering cellular metabolism or damaging the DNA directly in the cells,which it will mostly interfere with the biological process and it induces the uncontrolled, and malignant division, of ultimately leading to the formation of tumors. There are two types of the carcinogen. The Direct-acting carcinogens,and Indirect-active carcinogen. The Direct are reactive to electrophiles and the Indirect generally are unreactive water-insoluble compounds. All chemical carcinogens act as mutagens and mostly,the mutagenicity of most compound identifies as carcinogen for experimental animals has been demonstrated in simple bacterial essays. This happens from the mutagenic potential of the compounds that is roughly proportional to carcinogen potential.