Abstract: Sustainable Development Goal target 8.7 aims to eradicate child labour in all its forms by 2025. Ten years before this deadline, the objective is far from being achieved since in 2016, about one-in-ten children (152 million in total) aged 5 to 17 were engaged in child labour worldwide, many of them as unpaid family workers in agriculture. Nearly half of the children in child labour were in hazardous work and exposed to serious health and safety risks. Moreover, about one-third of children in child labour do not attend school at all; the others go to school, but not all the time. Children in child labour are more likely to leave school early, before grade completion, and underperform in school tests. This paper reviews child labour trends, and the literature on its causes and consequences. It also discusses policies to combat child labour based on the lessons of the available evidence. Countries must combat child labour by addressing it from all its "demand" and "supply" side dimensions: by strengthening social protection to combat extreme poverty, by investing in the education to make it an affordable alternative to child labour, and by encouraging the diffusion of technologies that make it possible to do without child labour. While most countries have adopted laws that prohibit child labour, the paper argues that countries can do more to enforce these laws and regulations, where necessary strengthen labour inspections and monitoring systems, and promote responsible business practices