Short answers, pulled from the story.
Two-thirds of the workers in 143 water-powered cotton mills across England and Scotland were described as children in 1788. Boys as young as four worked as chimney sweeps, exposing them to soot and toxic chemicals daily.
An estimated 168 million children aged 5 to 17 worldwide were involved in child labour in 2013. Africa has the highest percentage of children employed as child labour with over 65 million affected while Asia accounts for about 114 million child labourers.
Four African nations including Mali Benin Chad and Guinea-Bissau witnessed over 50% of children aged 5 to 14 working in 2017. These nations are among those identified by the Maplecroft Child Labour Index 2012 as having high risks for child labour.
ILO Minimum Age Convention C138 of 1973 defines child labour as any work performed by children under age 12 non-light work done by children aged 12 to 14 and hazardous work done by children aged 15 to 17. This convention has been ratified by 171 countries.
The US State Department estimated there were 15,000 child slaves working on cocoa cotton and coffee farms in Ivory Coast in 2001. Malian officials believed that 15,000 children some as young as 11 were working in Ivory Coast during that year.