Wind energy is the oldest form of energy known to mankind, being that it was around the dawn of civilisation when the tie between man, wind and cultural development was formed. Around 5 000 BC, human beings were pushed up the Nile River by the prevailing northerly sea breeze, while ancient architects used wind to naturally ventilate their buildings. By 200 BC, the Chinese were using windmills to pump water and the Persian's, among others, used reed sails to grind their grain.

Can private finance provide the solution to efficiency and cost control within the public infrastructure milieu? ISIZA speaks with Robert Gecelter from Investec's Capital Markets division.