But when you have bad governance, of course, these resources are destroyed: The forests are deforested, there is illegal logging, there is soil erosion. I got pulled deeper and deeper and saw how these issues become linked to governance, to corruption, to dictatorship.

You can't reduce poverty in a vacuum. You are doing it in an environment.

For me planting a tree is a very doable thing. It's not complicated, it doesn't require technology, it doesn't require much knowledge, but it can be a very important entry point into communities understanding how they destroy their own resources, but how they can also restore those resources, and not wait for their government or international agencies to come and help them.

I'm sure the government of Qatar is not coming in to grow food for the people of Kenya; it's coming to grow food to sell. If it can also sell to the people of Kenya, well, then good. I think that the moves can be helpful, but I think that the history that Africa knows, as I say in my book, has been a history of exploitation.

We owe it to ourselves and to the next generation to conserve the environment so that we can bequeath our children a sustainable world that benefits all.

The issue of climate change, it really does bring home the fact that we are on one planet, and that some of the impact of what human beings do in one corner of the world is going to affect people in a distant corner of the world. So we may still feel very far from each other, but we are really very close to each other because of the changes we have made with travel and technology and especially the information technology.

You cannot enslave a mind that knows itself. That values itself. That understands itself.