India's sacred Ganges river gets clogged and polluted by pilgrims' floral offerings. So an entrepreneur has found a solution -- upcycling the waste into sustainable products. Find out more about efforts to preserve our waterways on #CallToEarth Day here: cnn.it/3FGd4Gr | CNN

The Ganges is one of the world's most sacred rivers, but it is also one of the dirtiest. The build-up of toxic material and fecal waste has killed all marine life. The Ganges River is polluted by many sources, including: Sewage: Over a billion gallons of untreated sewage flows into the river each day from Varanasi, an ancient city and the spiritual center of Hinduism Industrial waste: The tannery industry in Kanpur, which is located halfway along the river, produces effluents that contain chromi