Coal ash is a byproduct generated from burning coal in power plants. It consists of fine particles and can include materials like fly ash, bottom ash, and boiler slag. These materials are often used in construction, such as in concrete, but can also pose environmental risks if not managed properly. When coal ash is disposed of improperly, it can contaminate soil and water sources with harmful substances, including heavy metals like arsenic and lead. Regulations exist to ensure safe handling and disposal, but concerns about coal ash management continue to be a significant environmental issue in many regions.