New research of into one of India's biggest and holiest rivers has revealed that it contains high levels of toxic pollutants.
Vegetables grown on the Yamuna's banks appear to be contaminated, mainly due to waste dumped by factories, posing a threat to people who live nearby.
More than 57 million people depend on the river for their water supply and 70 per cent of Delhi's water comes from it.
Locals have appealed to the government to help solve the issue, but authorities have done little to fix the problem.
Al Jazeera's Prerna Suri reports from Delhi.
