Indian's exploited child cotton workers
In India, hundreds of thousands of children are thought to be involved in picking and processing cotton.
Many household-name retailers concede they do not know exactly how the cotton they use is farmed and processed.
Yet, for years, labour activists in India have campaigned for their help.
The BBC has seen evidence that children as young as 10 are working in dangerous conditions, for little pay.
Humphrey Hawksley reports.