The Nile cuts through Cairo and it's virtually Egypt's only source of fresh water. (Photo/CTSNOW/Flickr).

Over 300 Million Rely On It: Why The 11 Nations That Depend On The Nile Need To Reach A River Deal Soon

More than 80% of the water reaching Egypt comes from the Blue Nile which originates in Ethiopia.

The picturesque lake straddling Rwanda and the DR Congo has a dark side. (Photo/ Flickr/ Steve Evans)

What’s So Special About Kivu? Here’s Why Exploring For Oil In This Little Lake Is A Very Big Deal

There is over 60km of methane gas dissolved in the deep water of the lake; the supersaturated gas would release spontaneously if the deep water was displaced upward – just like a soda bottle pops when it is vigorously shaken