By ALAN MacDONALD
Published: June 17, 2012
FOR a continent where more than 300 million people lack access to safe drinking water, Africa is sitting on a lot of it.
The journal Environmental Research Letters recently published a set of maps of groundwater resources in Africa, the results of two years of research led by the British Geological Survey and financed by the British Department for International Development. The research showed that in Africa the volume of water naturally stored underground within the cracks and pores of rocks is much larger (possibly 20 times more) than the 8,000 cubic miles of water visible in lakes and rivers...more