Approximately, yearly and globally, almost 20 million people get sick and almost 10 million people die from all cancers. This book elaborates the chemical elements and chemical compounds that very probably contribute to both cancer occurrence in over 13.5 million people and death from cancer in over seven million people. Moreover, chemical elements and chemical compounds very probably contribute to cancer occurrence in about 68% of all cancer cases and very probably significantly contribute to cancer death in about 72% of all cancer deaths. Carcinogenesis may last decades, and before malignant disease occurs, many other nonmalignant diseases (the most frequent are cardiovascular diseases, endocrinological diseases, neurological diseases, hematological diseases, and dermatological diseases) appear caused or supported by chemical carcinogens (Table 1). Because of growing of world population and unproportional growing of the elderly population, consequently, by 2050, the number of cancer cases is predicted to reach 35 million. This publication offers to the user a highly effective, affordable, applicable, noninvasive, quick, and cheap method to avoid or reduce one’s exposure to the most dangerous chemical carcinogens.