EMF (electromagnetic fields) come from both natural and man-made sources and can be categorized as either ionizing or non-ionizing radiation. Non-ionizing radiation is unlikely to cause cancer but can pose risks to eyes and skin with excessive exposure, while even low doses of ionizing radiation can damage living tissue and cause cancer or genetic mutations. Common sources of EMF include power lines, appliances, cell phones and towers, WiFi routers, medical devices, and certain building materials. To reduce health risks, the document recommends monitoring EMF levels and limiting daily exposure.