There are jobs that are hazardous in themselves and affect child labourers immediately. They affect the overall health, coordination, strength, vision and hearing of children. One study indicates that hard physical labour over a period of years stunts a child's physical stature by up to 30 percent of their biological potential3 . Working in mines, quarries, construction sites, and carrying heavy loads are some of the activities that put children directly at risk physically. Jobs in the glass and brassware industry in India, where children are exposed to high temperatures while rotating the wheel furnace and use heavy and sharp tools, are clearly physically hazardous to them.
II. Cognitive hazards
Education helps a child to develop cognitively, emotionally and socially, and needless to say, education is often gravely reduced by child labour. Cognitive development includes literacy, numeracy and the acquisition of knowledge necessary to normal life. Work may take so much of a child’s time that it becomes impossible for them to attend school; even if they do attend, they may be too tired to be attentive and follow the lessons.
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