Why has there been so much secrecy about AIDS? When you ask where did the virus come from, it raises a lot of flags. That makes me suspicious.

The government of Qatar, as I mentioned, has proposed to come and lease Kenya's Tana River delta in order to farm there. What I am not sure of is, has an environmental impact assessment been made to ensure that exploiting this delta for agricultural activities is the best way we can use the delta?We must be concerned about the long-term impact of agricultural activities in the delta.

There's a general culture in this country to cut all the trees. It makes me so angry because everyone is cutting and no one is planting.

Passion begins with a burden and a split-second moment, when you understand something like never before. That burden is on those who know. Those who don't know are at peace. Those of us who do know get disturbed and are forced to take action.

Tradition sometimes excludes the girl child from inheriting; or single women may not want to be perceived as pursuing too much property. The law has come a long way in favor of the woman, but it is the tradition, the attitudes, that we often have to fight.

As a scientist I cannot say we don't want to hear anything about GMOs, because these are advances in science. But I think its also important, especially when you are dealing with food, to be cautious.

People are dynamic. They change, and soon as there are enough of you, things change [for a whole society].