Unable to walk, he gave up scavenging rubbish - his only source of income. He was lying on the street waiting to die when social workers found him and took him to one of the city's few drug treatment clinics. Singh now takes a daily morphine substitute, but his life hangs in the balance. Most days he lies in a desolate city park struggling with addiction, eating only twice a week when the local Hindu temple offers free meals. The park is home to hundreds of other addicts like Singh.
Users sit in the dust helping one another to inject.
Some are so desperate they crush headache tablets into bore water and inject the murky mixture. The appalling conditions mean that most addicts develop huge abscesses on their limbs. Gangrene is rife. Local drug counsellors said last year it was common to find a number of bodies in the park, especially on winter mornings. Yet new addicts arrive at the park every day, storing their few belongings in plastic bags in the trees.