Chemical substances. Such incomprehensible, invisible, and sometimes capable of killing us. We often meet them in everyday life, but we do not even know what danger they can carry for us. Toxins in food, contaminated water, unsafe substances in medicines, and poisonous compounds even in the air. What poisons exist in nature, and which ones were created by man himself? What substances destroyed thousands of people, and what cured them? Where does death lie in wait for us and how can we protect ourselves from it? You will find answers to these questions in this book.Editorial design preserved in PDF A4.