Months of unrest in Congo's volatile but resource-rich east ishampering an international push to curb the traffic of gold, tin and other metals by rebel groups, efforts which campaigners say are the key to ending violence and encouraging legitimate mining.International organisations such as the Organisation for Economic Co-operation and Development (OECD) and the United Nations, and pressure groups including the Enough Project and Global Witness, want to cut the rebels' access to funds by insisting that companies do due diligence on metals they buy.Part of this effort is a campaign to "bag and tag" products at the mine to certify their origins. But that push, which is still in its early stages in the North Kivu province that has seen heavy fighting, has stalled since clashes between the M23 rebels and Government soldiers intensified this month.
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