Environmental diseases are health conditions caused by exposure to harmful substances in the environment. These can include pollutants in the air, water, and soil, as well as chemicals found in everyday products. Common examples of environmental diseases include asthma, lead poisoning, and certain types of cancer linked to environmental toxins. Factors such as industrial waste, pesticides, and heavy metals can contribute to the development of these diseases. Vulnerable populations, including children and the elderly, are often at greater risk. Understanding the sources and effects of environmental diseases is crucial for public health and prevention efforts.