Coal washing is a process used to remove impurities from coal before it is used for energy production. This process involves crushing the coal and then using water and chemicals to separate the valuable coal from unwanted materials like dirt, ash, and sulfur. The goal is to improve the quality of the coal, making it more efficient for burning and reducing harmful emissions. The cleaned coal, often referred to as washed coal, has a higher energy content and lower levels of pollutants. This not only enhances its performance in power plants but also helps in meeting environmental regulations, contributing to cleaner energy production.