0 ENVIRONMENTAL IMPACT OF REFUGEES AND INTERNALLY DISPLACED PERSONS IN SUB-SAHARAN AFRICA Prof. John O. Oucho Centre for Research in Ethnic Relations University of Warwick Coventry, CV4 7AL United Kingdom E-mail: [email protected] Keynote Address to the African Migration Alliance Biennial Workshop on Climate Change, Environment and Migration, East London, South Africa, 15-16 November 2007