Sight of people fighting over water sends plumbers on to India's streets | Amrit Dhillon

With the country's major cities set to run out of groundwater in 2020, volunteers are helping to conserve precious supplies

Drenched in perspiration on a muggy Sunday afternoon in New Delhi, Ashia Saifi climbs up and down the stairs of apartment buildings, ringing on doorbells and asking if residents have any leaking taps they want fixed.

Sometimes, the door is slammed shut in her face. People are scared of intruders and strangers, even though Saifi sports a little white cap that's the emblem of the Aam Aadmi party (Common Man), or AAP, which rules the Indian capital.