According to the Labour Laws of Bangladesh, the minimum legal age for employment is 14. However, as 93 per cent of child laborers work in small factories and workshops, and on the street - the enforcement of labour laws is virtually impossible. Poverty causes families to send children to work, often in hazardous and low-wage jobs, such as brick-chipping, construction and refuse collecting. Children are paid less than adults, with many working up to twelve hours a day. Full-time work frequently prevents children from attending school. Long hours, low or no wages, poor food, isolation and hazards in the working environment can severely affect children's physical and mental health.