Africa, North-Economic policy-21st century 1 Africa, North-Social policy-21st century 1 Arab countries- Environmental conditions 1 Climatic changes- Arab countries 1 Climatic changes- Economic aspects- Arab countries 1 Climatic changes- Effect of human beings on- Arab countries 1 Climatic changes- Social aspects- Arab countries 1 Middle East-Economic policy-21st century 1 Middle East-Social policy-21st century 1