Interesting, the variations in explaining this stuff away. Here are you saying "this labour is just part of being a family in Africa", and upthread there's someone saying "if children didn't have these jobs, they'd be forced into prostitution".

> When parents know that there are some dangerous chemicals, they would not involve their children.

I've seen first-hand, here in a first-world country, people with engineering degrees working in manufacturing with dangerous chemicals refuse to bother putting on safety gear.

Hell, the whole OH&S industry has trouble getting employees to act safely, not just employers.