South Africa: On The Edge of Darkness

South Africa is struggling to keep the lights on. Its power system is crumbling, leading to regular and extensive blackouts - and it's the poorest who are hardest hit. Why is it in such bad shape, and what hope is there of South Africa kicking its addiction to coal and switching to greener sources of energy? Andrew Harding uncovers a story of corruption and vested interests at the heart of South Africa's power failure.