A new report has highlighted the economic dangers facing countries that rely heavily on the export of raw materials... The study of Liberia - by the Canadian lobby group Partnership Africa Canada and a group of Liberian lawyers called Green Advocates - looks at the country's...exploitation of tropical timber, rubber and minerals. It concludes that the raw materials sector requires a major re-organisation so that more of the population has a stake in it. And it warns that Liberia has an urgent, once-in-a-lifetime opportunity to address this issue... On diamonds...the report says there has been little effort by the government to make the gems benefit local communities or the artisanal miners... This attitude, say the authors, is in sharp contrast to the forestry sector...