textured brown coal piles exhibit dark hues under fading light in a natural environment

monochrome black iron snow winter frost rock leaf soil ice freezing white plant flower food branch brown coal mining natural resources geology energy production fossil fuels dark rock industrial excavation environment minerals energy coal geology formation sedimentary raw material landscape earth extraction textures environmental impact resource management organic quarrying fuel source mineral thermal deposits chemical composition industry carbon hydrocarbon generation solid fuel lignite carboniferous sector sustainability climate change power utility development economic impact