There could be a shortage of clean water if South Africans do not work to conserve it.
JOHANNESBURG - African economies lose up to 25 percent of Gross Domestic Product to floods and droughts every year.
At the same time, 35 percent of people on the continent don&39;t have access to clean drinking water.
The Institute for Security Studies says research shows South Africa is exploiting its water resources -- with devastating effects.
And over the next 20 years, that consumption will increase substantially as the population grows.
Although government has proposed interventions to increase supplies and reduce demand -- it&39;s just not enough.
* Watch the full video report by John Bailey in the gallery above.