Lead exposure occurs when individuals come into contact with lead, a toxic metal that can harm health. Common sources include old paint, contaminated soil, plumbing pipes, and certain imported toys. Children are particularly vulnerable, as they may ingest lead dust or chips while playing. Health effects of lead exposure can range from developmental delays and learning difficulties in children to high blood pressure and kidney damage in adults. Reducing lead exposure involves identifying and eliminating sources, such as removing lead-based paint and ensuring safe drinking water through proper plumbing, thereby protecting public health and safety.