The Ganges River is over 2,500 km long and flows through several countries including China, India, Nepal, and Bangladesh. It is considered sacred in Hinduism and people bathe in it to wash away sins. However, pollution is a major problem as many cities draw drinking water from the river and untreated waste is dumped into it. The Ganges is important for irrigation, agriculture, fishing, and generating electricity, but efforts are needed to control pollution to protect the hundreds of millions who depend on the river.