It is evident that many wars are fought over resources which are now becoming increasingly scarce. If we conserved our resources better, fighting over them would not occur ... protecting the global environment is directly related to securing peace. Those of us who understand the complex concept of the environment have the burden to act. We must not tire, we must not give up, we must persist.

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

One of the reasons why we started the Green Belt Movement is to work with these ordinary peasant farmers so as to educate them that, despite the fact that they are poor, it is in their interest to protect the soil that they have, to protect the forest they have, to protect the land that they have, because if they don't do it, things can be only worse tomorrow for them for them and for their children.

It's the little things citizens do. That's what will make the difference. My little thing is planting trees.

All through the ages the African people have made efforts to deliver themselves from oppressive forces.

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.

I know there is pain when sawmills close and people lose jobs, but we have to make a choice. We need water and we need these forests.