👉 The word "poisonous" is often used to describe something that has a negative or harmful effect on someone's health, especially when it involves toxins. It can also refer to something that is toxic in nature, such as poison ivy, which causes an allergic reaction. In the context of pollution, the term "poisonous" refers to substances or chemicals that are harmful to human health and the environment. Pollution can come from a variety of sources, including industrial activities, natural disasters,