The government will also promote exports and service industries such as tourism to boost foreign-exchange earnings.

CNN: Getting Down to Work

To earn the foreign exchange needed to pay for imports and to service debts, reliance on a single commodity (like Zambia's copper) is just too risky.

ECONOMIST: Zambian copper

In fact, many high schools (secondary schools) around the US support a traditional foreign exchange student club and national organization, the American Field Service (AFS), founded by WWI ambulance drivers like Mr. Patch.

BBC: Have your say: Harry Patch