Angola economy in crisis as rubbish piles up in the capital For the last 6 months, Luanda, Angola's sprawling capital city, has become an open-air dumping site since the company responsible for removing the rubbish says it has not been paid by the local authorities. Africa's second largest oil producer has plunged into an economic crisis as the drop in the price of crude oil to its lowest level in more than a decade has pushed Angola's currency, the kwanza, to record lows. IMAGES AND SOUNDBITES.