The Ganges river in India is more than 2,500km long and has the most populated river basin in the world. Hundreds of millions of people and a huge range of wildlife rely on the river Ganges. But ...

The dark ribbon curls down a dirt embankment and flows into the Ganges River. "That's toxic runoff," says Rakesh Jaiswal, a 48-year-old environmental activist, as he leads me along the refuse ...

Sue Perkins undertakes an epic, personal journey to the source of India's Ganges river in the Himalayas, meeting hermits and holy men to understand the sacred nature of this river.