Uganda has dismissed claims that it has been secretly draining Lake Victoria to maintain electricity supplies. A report by the International Rivers Network, a US-based environment group, said Uganda was taking more water than agreed from the lake to generate power.
This accounted for half of the drop in the lake's levels, which are at their lowest in 80 years, the report said.
But Ugandan officials who spoke to the BBC said a prolonged drought was the sole cause of the low water levels. Tanzania has also blamed drought for recent power cuts because of lower hydro-electric output.
Analysts have warned of conflict, as East African nations compete for water.
*Lack of proper water share in varoius countries are another major problems of environment, and the world should look into these issues with care.