Human health effects refer to the physiological and psychological impacts that various factors, such as environmental pollutants, chemicals, lifestyle choices, and biological agents, can have on individuals. These effects can range from mild symptoms, like headaches or skin irritation, to severe conditions, including chronic diseases, respiratory problems, neurological disorders, and cancer. Understanding these effects is essential for assessing risks, developing public health policies, and implementing protective measures to safeguard health and well-being.