The chapter discusses coal-fired power plants and how different types of coal can be cleaned to improve their quality, making them better for the environment. They look at technologies used in traditional coal-burning power plants like boilers and steam turbines. Cleaning coal before burning can reduce sulphur emissions and ash production, which is good for plant performance. It's cost-effective to use coal for power, but it's best to have power plants near the coal mines to save on transportation costs. Different types of coal have unique properties that affect how suitable they are for generating power. Overall, cleaning coal before burning it can help make power plants run better and produce fewer harmful emissions.