Lignito, also known as lignite, is a type of coal that is considered the lowest rank among coal varieties. It is brownish-black in color and has a high moisture content, making it less efficient as a fuel source compared to higher-grade coals like bituminous coal or anthracite. Lignite is primarily used for electricity generation in power plants due to its relatively low energy content. This type of coal forms from the remains of ancient plants that have undergone a process of partial decomposition over millions of years. Lignite deposits are often found near the surface, making them easier to mine. Countries like Germany and the United States have significant lignite reserves, which contribute to their energy production.