**Acknowledgements**

We register our thanks to AGAPAO, non-governmental organization that gave information about the internally displaced people of Kok-Ndoe in Yaounde 7. We are grateful to the Norwegian Church Aid for the pictures of water crisis in Mayo-Tsanaga and those from conflicts in the Logone and Chari (Far-North Cameroon) and Darfur (South Sudan).

We are equally thankful to the Institute of Medical Research and Medicinal Plants Studies for granting me time for this research.

The corresponding author is also grateful to his darling Irene Assiam for her tremendous encouragement while putting together this chapter.
