I think he knows a hell of a lot more about the situation at Lake Victoria than you do.
Leakey's appeal, made in a BBC presentation entitled the "Selfish Green" was part of a panel discussion between him, Richard Dawkins, Jane Goodal, and David Attenborough.
The discussion can be viewed on line:
http://www.youtube.com/watch?v=b7Qk6rJIaD4&mode=related&search=Africa is a place where humanity may hope that the expansion of nuclear energy will save a desperate population, a population that isn't quite capable of spending a few hundred thousands dollars to buy enough solar cell toys and hydrogen generators to fuel each McMansion.
African nations considering nuclear energy include South Africa (which already has nuclear energy), Nigeria, Morrocco, Egypt, Angola and maybe a few others I haven't heard about. One hopes that Kenya will be added to the list, and, given the destruction of Lake Victoria, one of humanity's environmental treasures, Uganda as well.
The world's largest (by a vast amount) source of renewable energy is hydroelectric energy. Hydroelectricty provides about 10 exajoules of energy and all of the other forms of renewable energy produce about 5 exajoules (thermal) and less than two exajoules of electricity. In the meantime world energy demand is 470 exajoules and
rising.
People like to
pretend that renewable energy has no external cost and no risk, but this is pure delusion. The world's largest energy disaster of all time was a renewable energy disaster and it involved hydroelectricity and the deaths of hundreds of thousands of people in a few hours.
Even if you don't give a rat's ass about that fact, I do.