Children are used to produce everything from pornography in Ukraine to fireworks in the Philippines and diamonds in Sierra Leone, the US Department of Labour said in a report published last week.

The report lists 122 goods "produced with forced labour, child labour, or both, in 58 countries" from Afghanistan to North Korea to Uzbekistan.

"Agricultural crops comprise the largest category, followed by manufactured goods and mined or quarried goods," said the report, which was mandated by Congress in 2005, when lawmakers passed the Trafficking Victims Protection Reauthorisation Act.

Child labour was more common than forced labour, and the goods most often produced by children were cotton, sugar cane, tobacco, coffee, rice, and cocoa in agriculture; bricks, garments, carpets, and footwear in manufacturing; and gold and coal in mined or quarried goods.

Strawberries from Argentina, footwear from Bangladesh, gold and silver from Bolivia, and rubber from Cambodia were brought to international markets with the work of child labour.

Myanmar, which is listed in the report as Burma, used child and forced labour to produce 14 products, ranging from jade to teak wood.

In India, children worked on glass bangles, leather goods and soccer balls; in Pakistan, they are used to make carpets.

And in Russia and Ukraine, the Philippines and Thailand, they were used in the production of pornography.

"The International Labour Organisation estimates that over 12 million persons worldwide are working in some form of forced labour or bondage and that more than 200 million children are at work, many in hazardous forms of labour," the report said.

The global economic crisis has "exacerbated the vulnerability" of the most easily exploited workers, including children, women and migrants, it added.