Why is there a lot of coal in the US?

The abundance of coal in the U.S. is primarily due to the country's geological history, which includes extensive sedimentary basins formed during the Carboniferous period, around 300 million years ago. These basins accumulated large amounts of plant material that eventually transformed into coal through heat and pressure over millions of years. Additionally, the U.S. has vast land areas with rich coal deposits, particularly in states like Pennsylvania, West Virginia, and Wyoming, making it one of the largest producers of coal in the world. This natural resource has historically been a key component of the nation’s energy supply.