First of all, farmers should work with universities and research institutions in the country, and hopefully with the government.

When you think of all the conflicts we have - whether those conflicts are local, whether they are regional or global - these conflicts are often over the management, the distribution of resources. If these resources are very valuable, if these resources are scarce, if these resources are degraded, there is going to be competition.

Now when Nile perch was introduced [into Lake Victoria], I don't think enough research was done; maybe it was done, maybe it was not. But Nile perch is a huge fish. So it ate all the little fish, and it grew into a monster which the local people could not fish with their little boats and their little nets.

Nile perch is a fish that was introduced into Lake Victoria. The reason that fish was introduced into Lake Victoria was because it was decided that the people living near the lake needed more proteins than they were getting.

One of the reasons why I've written The Challenge for Africa is to save it. Surely there are so many problems we can solve in Africa, but first and foremost, we need a government that feels responsible to protect their own people from the exploitations, from the misuse, from the mistreatment that they can easily get.

We do the right thing not to please people but because it's the only logically reasonable thing to do, as long as we are being honest with ourselves - even if we are the only ones.

When we plant trees, we plant the seeds of peace and seeds of hope.