aOccupational Knowledge International, 4444 Geary Boulevard, Suite 208, San Francisco, CA 94118 USAbUniversity of Nairobi, Chemistry Department in the College of Biological and Physical Sciences, P. O. Box 30197–00100, Nairobi, KenyacSustainable Research and Action for Environmental Development (SRADev), 18, Olorunlogbon street, Anthony village, Lagos, NigeriadAssociation de l′Education Environnementale pour les Futures (AEEFG), 15 rue de Liban La Marsa, 2070 Tunis, TunisiaeCenter for Industrial Studies, Safety and Environment (CEISA), Mozambique, Rua Joseph Ki-Zerbo n° 170, Maputo, MozambiquefOccupational Knowledge International, 4444 Geary Boulevard, Suite 208, San Francisco, CA 94118, USAgCREPD, Research and Education Center for Development (Centre de Recherche et d′Education pour le Développement), 3rd Floor, Ecotex Building, Madagascar Quarter P.O. Box 2970, Yaoundé, Cameroon