Chemicals. So incomprehensible, invisible, and sometimes capable of killing us. We often meet them in everyday life, but we don't even know what danger they can pose to us. Toxins in food, contaminated water, unsafe substances in medicines and poisonous compounds even in the air. What poisons exist in nature, and what man himself created? What substances destroyed thousands of people, and which cured them? Where is death lying in wait for us and how to protect ourselves from it? You will find answers to these questions in this book.