The holy but toxic river Ganges will be purified by Mr Modi.
During frequent power cuts, the sewage flows untreated into the Ganges.
There are seven sacred rivers, including the Ganges.
In Africa it is said that "even the jackal deserves to drink .A second consequence is that water often has a sacred or mystical quality that is invested in deities like Gong Gong and Osiris and rivers like the Jordan and the Ganges.
He also took occasional trips notably to Japan and China to seek more trade and investment.If outsiders seek a high-profile project to win his favour, one option would be to offer help with his promise to clean the Ganges.
American factories cause acid rain that poisons Canadian forests; Indian ones pollute the Ganges, ruining rice paddies in Bangladesh.
At the same time, the rapid melting of Himalayan glaciers promises to deprive the great rivers of the Indian sub-continent, the Indus, Ganges and Brahmaputra, of their summertime source.
In June last year, at least 1,000 people, including many pilgrims near the source of the River Ganges, were killed by flash flooding in India (within a month the state government declared 5,700 people missing and presumed dead).
The Ganges and one of its main tributaries, the Yamuna, which runs through Delhi, were allotted over half of this cash.
Since 1985, and the launch of an emergency plan to save the Ganges, India has dedicated 51 billion rupees ($1.2 billion) to cleaning its rivers, mostly by urging state governments to build sewage-treatment plants beside them.
Alas, with 1,000 extra vehicles on its roads every day, Delhi's air is now filthier than ever.Correction: we mistakenly wrote that the Ganges contains 60,000 bacteria per millilitre.
