Busy traders at India's Kumbh Mela festival
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India's Kumbh Mela festival is good for traders

It is claimed India's Kumbh Mela festival is the biggest gathering of people on earth.

Over the next few weeks it is estimated a hundred million people will travel to where the Ganges and Yamuna rivers meet, believing the waters can cleanse them of sin.

However as the BBC's Adrienne Murray reports, while religious belief draws millions to the festival, the event is also a business opportunity for many traders.

Go to next video: The economics of India's Kumbh Mela