'My children are suffering but what can I do?' Delhi's polluted air, by the people who live there

A family living in the middle of an eight-lane motorway, an autorickshaw driver struggling to breathe, a young woman who can't wait to leave ... the foul air of India's capital affects all sections of society

For three years Mohammad Yunus, his wife Babli, five children and a handful of relatives have made their home on a patch of concrete in the middle of an eight-lane motorway, near a stretch of road named after Mahatma Gandhi. As lorries, buses and motorcycles roar past on either side of the family's cramped bit of south Delhi pavement, and a modern, concrete flyover carries several more lanes of traffic overhead, their evening routine unfolds.

A young woman in a pink dress squats to kindle a fire from wooden sticks and plastic bottles, then breaks a lump of dough into pieces to bake into chapatti bread. A three-month-old baby and a toddler sleep on a dirty mat just a few feet from the curb. The incessant blaring of horns makes conversation difficult, but does not rouse the children.