Nearly a quarter of a million children, or 16 out of every 100 children worldwide, are engaged in exploitative child labour - in violation of the Convention on the Rights of the Child and international labour standards. Almost three-quarters of them work in hazardous environments, such as mines or factories, or with dangerous substances, such as chemicals. In political economy, economics, and sociology, exploitation involves a persistent social relationship in which certain persons are being mistreated or unfairly used for the benefit of others. This corresponds to one ethical conception of exploitation, that is, the treatment of human beings as mere "objects". In different terms, "exploitation" refers to the use of people as a resource, with little or no consideration of their well-being. Results have showed that the age of children who are exposed to different work is in the early childhood. Therefore, appropriate care should be given to this age categories of children by sending the children to school rather than using them for performing different types of work.